Yidris

Whenever you cast a spell, you gain 1 life for each spell you've cast this turn.

Pay 50 life: Aetherflux Reservoir deals 50 damage to any target.

Suspend 4—{U} (Rather than cast this card from your hand, pay {U} and exile it with four time counters on it. At the beginning of your upkeep, remove a time counter. When the last is removed, cast it without paying its mana cost.)

Target player draws three cards.

({T}: Add {B} or {R}.)

({T}: Add {B} or {G}.)

{T}, Pay 1 life, Sacrifice Bloodstained Mire: Search your library for a Swamp or Mountain card, put it onto the battlefield, then shuffle.

Draw three cards, then put two cards from your hand on top of your library in any order.

({T}: Add {G} or {U}.)

As Breeding Pool enters the battlefield, you may pay 2 life. If you don't, it enters the battlefield tapped.

Converge — Search your library for a creature, instant, or sorcery card with mana value less than or equal to the number of colors of mana spent to cast this spell, exile that card, then shuffle. You may cast that card without paying its mana cost.

Whenever an opponent plays a land, you may put a land card from your hand onto the battlefield.

{X}, {T}: Untap X target lands.

Lands you control have "{T}: Add one mana of any color."

{T}: Add one mana of any color.

{T}: Add one mana of any color in your commander's color identity.

Creeping Tar Pit enters the battlefield tapped.

{T}: Add {U} or {B}.

{1}{U}{B}: Creeping Tar Pit becomes a 3/2 blue and black Elemental creature until end of turn and can't be blocked this turn. It's still a land.

Return target nonland permanent you don't control to its owner's hand.

Overload {6}{U} (You may cast this spell for its overload cost. If you do, change "target" in its text to "each.")

Delve (Each card you exile from your graveyard while casting this spell pays for {1}.)

Look at the top seven cards of your library. Put two of them into your hand and the rest on the bottom of your library in any order.

Dimir Aqueduct enters the battlefield tapped.

When Dimir Aqueduct enters the battlefield, return a land you control to its owner's hand.

{T}: Add {U}{B}.

Undaunted (This spell costs {1} less to cast for each opponent.)

Exile two target creatures. For each of those creatures, its controller reveals cards from the top of their library until they reveal a creature card, puts that card onto the battlefield, then shuffles the rest into their library.

You may play an additional land on each of your turns.

You may play an additional land this turn.

Draw a card.

Reveal the top five cards of your library. An opponent separates those cards into two piles. Put one pile into your hand and the other into your graveyard.

Faerie Conclave enters the battlefield tapped.

{T}: Add {U}.

{1}{U}: Faerie Conclave becomes a 2/1 blue Faerie creature with flying until end of turn. It's still a land.

Search your library for a Plains, Island, Swamp, or Mountain card, put it onto the battlefield tapped, then shuffle.

{T}: Add one mana of any color that a land an opponent controls could produce.

({T}: Add {G}.)

Draw two cards, then discard two cards. Untap up to three lands.

Play with the top card of your library revealed.

You may play lands and cast spells from the top of your library.

{T}: Add three mana of any one color.

Golgari Rot Farm enters the battlefield tapped.

When Golgari Rot Farm enters the battlefield, return a land you control to its owner's hand.

{T}: Add {B}{G}.

{T}: Add {C}.

{1}, {T}, Sacrifice Grixis Panorama: Search your library for a basic Island, Swamp, or Mountain card, put it onto the battlefield tapped, then shuffle.

Gruul Turf enters the battlefield tapped.

When Gruul Turf enters the battlefield, return a land you control to its owner's hand.

{T}: Add {R}{G}.

Whenever a player taps a land for mana, that player adds one mana of any type that land produced.

Hissing Quagmire enters the battlefield tapped.

{T}: Add {B} or {G}.

{1}{B}{G}: Hissing Quagmire becomes a 2/2 black and green Elemental creature with deathtouch until end of turn. It's still a land.

Exile Ill-Gotten Gains. Each player discards their hand, then returns up to three cards from their graveyard to their hand.

Look at the top four cards of your library. Put one of them into your hand and the rest on the bottom of your library in any order.

Choose one —

• Counter target spell.

• You may choose new targets for target spell.

• Copy target instant or sorcery spell. You may choose new targets for the copy.

({T}: Add {U}.)

Izzet Boilerworks enters the battlefield tapped.

When Izzet Boilerworks enters the battlefield, return a land you control to its owner's hand.

{T}: Add {U}{R}.

{T}: Add {C}.

{1}, {T}, Sacrifice Jund Panorama: Search your library for a basic Swamp, Mountain, or Forest card, put it onto the battlefield tapped, then shuffle.

Lavaclaw Reaches enters the battlefield tapped.

{T}: Add {B} or {R}.

{1}{B}{R}: Until end of turn, Lavaclaw Reaches becomes a 2/2 black and red Elemental creature with "{X}: This creature gets +X/+0 until end of turn." It's still a land.

Suspend 3—{0} (Rather than cast this card from your hand, pay {0} and exile it with three time counters on it. At the beginning of your upkeep, remove a time counter. When the last is removed, cast it without paying its mana cost.)

{T}, Sacrifice Lotus Bloom: Add three mana of any one color.

Lumbering Falls enters the battlefield tapped.

{T}: Add {G} or {U}.

{2}{G}{U}: Lumbering Falls becomes a 3/3 green and blue Elemental creature with hexproof until end of turn. It's still a land.

{T}, Pay 1 life: Add one mana of any color.

At the beginning of your upkeep, flip a coin. If you lose the flip, Mana Crypt deals 3 damage to you.

{T}: Add {C}{C}.

If you tap a permanent for mana, it produces twice as much of that mana instead.

Add two mana in any combination of colors.

Draw a card.

{T}, Sacrifice Memory Jar: Each player exiles all cards from their hand face down and draws seven cards. At the beginning of the next end step, each player discards their hand and returns to their hand each card they exiled this way.

Whenever you cast an instant or sorcery spell, create an X/X colorless Construct artifact creature token, where X is that spell's mana value.

{3}{U}{U}, Exile Metallurgic Summonings: Return all instant and sorcery cards from your graveyard to your hand. Activate only if you control six or more artifacts.

Shuffle your library. Then exile the top card of your library. Until end of turn, you may play that card without paying its mana cost.

Storm (When you cast this spell, copy it for each spell cast before it this turn.)

{T}, Pay 1 life, Sacrifice Misty Rainforest: Search your library for a Forest or Island card, put it onto the battlefield, then shuffle.

Exile target card that's an instant or sorcery from your graveyard. For each card exiled this way, copy it, and you may cast the copy without paying its mana cost. Exile Mizzix's Mastery.

Overload {5}{R}{R}{R} (You may cast this spell for its overload cost. If you do, change "target" in its text to "each.")

({T}: Add {R}.)

Choose three. You may choose the same mode more than once.

• Counter target spell unless its controller pays {3}.

• Return target creature to its owner's hand.

• Draw a card.

Search your library for an instant or sorcery card, reveal it, then shuffle and put that card on top.

Flying

When Palinchron enters the battlefield, untap up to seven lands.

{2}{U}{U}: Return Palinchron to its owner's hand.

Each instant and sorcery card in your graveyard gains flashback until end of turn. The flashback cost is equal to its mana cost.

Flashback {4}{R} (You may cast this card from your graveyard for its flashback cost. Then exile it.)

{T}, Pay 1 life, Sacrifice Polluted Delta: Search your library for an Island or Swamp card, put it onto the battlefield, then shuffle.

Destroy target creature. It can't be regenerated. Its controller reveals cards from the top of their library until they reveal a creature card. The player puts that card onto the battlefield, then shuffles all other cards revealed this way into their library.

Look at the top three cards of your library, then put them back in any order. You may shuffle.

Draw a card.

Whenever a player casts a spell from their hand, that player exiles it, then exiles cards from the top of their library until they exile a card that shares a card type with it. That player may cast that card without paying its mana cost. Then they put all cards exiled with Possibility Storm on the bottom of their library in a random order.

{2}{U}, {T}: Put target creature on the bottom of its owner's library. That creature's controller reveals cards from the top of their library until they reveal a creature card. The player puts that card onto the battlefield and the rest on the bottom of their library in any order. Activate only as a sorcery.

Raging Ravine enters the battlefield tapped.

{T}: Add {R} or {G}.

{2}{R}{G}: Until end of turn, Raging Ravine becomes a 3/3 red and green Elemental creature with "Whenever this creature attacks, put a +1/+1 counter on it." It's still a land.

Rakdos Carnarium enters the battlefield tapped.

When Rakdos Carnarium enters the battlefield, return a land you control to its owner's hand.

{T}: Add {B}{R}.

Choose one —

• Tap X target permanents.

• Untap X target permanents.

{T}: Add one mana of any type that a land you control could produce.

Each player discards their hand, then draws seven cards.

Miracle {1}{R} (You may cast this card for its miracle cost when you draw it if it's the first card you drew this turn.)

Counter target spell. If that spell is countered this way, put it into its owner's hand instead of into that player's graveyard.

Draw a card.

Choose one —

• Untap all lands you control.

• Until end of turn, lands you control become 2/2 creatures that are still lands.

Entwine {2}{G} (Choose both if you pay the entwine cost.)

{T}, Pay 1 life, Sacrifice Scalding Tarn: Search your library for an Island or Mountain card, put it onto the battlefield, then shuffle.

{1}, {T}: Exile any number of cards from your hand face down. Put that many cards from the top of your library into your hand. Then look at the exiled cards and put them on top of your library in any order.

Return any number of cards with different mana values from your graveyard to your hand. Put Seasons Past on the bottom of its owner's library.

{1}: Look at the top three cards of your library, then put them back in any order.

{T}: Draw a card, then put Sensei's Divining Top on top of its owner's library.

{T}: Add {B}.

{B}, {T}: Target legendary creature gains fear until end of turn. (It can't be blocked except by artifact creatures and/or black creatures.)

Simic Growth Chamber enters the battlefield tapped.

When Simic Growth Chamber enters the battlefield, return a land you control to its owner's hand.

{T}: Add {G}{U}.

Search your library for up to two Forest cards, put them onto the battlefield, then shuffle.

Return target creature to its owner's hand. Untap up to two lands.

{T}: Add {C}{C}.

({T}: Add {U} or {R}.)

As Steam Vents enters the battlefield, you may pay 2 life. If you don't, it enters the battlefield tapped.

({T}: Add {B}.)

At the beginning of your draw step, you may draw two additional cards. If you do, choose two cards in your hand drawn this turn. For each of those cards, pay 4 life or put the card on top of your library.

({T}: Add {R} or {G}.)

Target player loses 2 life and you gain 2 life.

Storm (When you cast this spell, copy it for each spell cast before it this turn. You may choose new targets for the copies.)

Exile Time Spiral. Each player shuffles their hand and graveyard into their library, then draws seven cards. You untap up to six lands.

Each player shuffles their hand and graveyard into their library, then draws seven cards. (Then put Timetwister into its owner's graveyard.)

Delve (Each card you exile from your graveyard while casting this spell pays for {1}.)

Draw three cards.

Treetop Village enters the battlefield tapped.

{T}: Add {G}.

{1}{G}: Treetop Village becomes a 3/3 green Ape creature with trample until end of turn. It's still a land. (It can deal excess combat damage to the player or planeswalker it's attacking.)

({T}: Add {G} or {U}.)

Choose artifact, creature, or land. Tap all untapped permanents of the chosen type target player controls, or untap all tapped permanents of that type that player controls.

When you cast this spell, destroy target permanent.

Indestructible

Annihilator 4 (Whenever this creature attacks, defending player sacrifices four permanents.)

When Ulamog, the Infinite Gyre is put into a graveyard from anywhere, its owner shuffles their graveyard into their library.

({T}: Add {U} or {B}.)

Search your library for a card, then shuffle and put that card on top. You lose 2 life.

{T}, Pay 1 life, Sacrifice Verdant Catacombs: Search your library for a Swamp or Forest card, put it onto the battlefield, then shuffle.

({T}: Add {U} or {R}.)

Wandering Fumarole enters the battlefield tapped.

{T}: Add {U} or {R}.

{2}{U}{R}: Until end of turn, Wandering Fumarole becomes a 1/4 blue and red Elemental creature with "{0}: Switch this creature's power and toughness until end of turn." It's still a land.

({T}: Add {U} or {B}.)

As Watery Grave enters the battlefield, you may pay 2 life. If you don't, it enters the battlefield tapped.

Each player discards their hand, then draws seven cards.

{T}, Pay 1 life, Sacrifice Windswept Heath: Search your library for a Forest or Plains card, put it onto the battlefield, then shuffle.

{T}, Pay 1 life, Sacrifice Wooded Foothills: Search your library for a Mountain or Forest card, put it onto the battlefield, then shuffle.

Trample

When Worldspine Wurm dies, create three 5/5 green Wurm creature tokens with trample.

When Worldspine Wurm is put into a graveyard from anywhere, shuffle it into its owner's library.

Until end of turn, you may play lands and cast spells from your graveyard.

If a card would be put into your graveyard from anywhere this turn, exile that card instead.

Trample

Whenever Yidris, Maelstrom Wielder deals combat damage to a player, as you cast spells from your hand this turn, they gain cascade. (When you cast the spell, exile cards from the top of your library until you exile a nonland card that costs less. You may cast it without paying its mana cost. Put the exiled cards on the bottom of your library in a random order.)