O Gosh it's Obosh!

Acidic Soil deals damage to each player equal to the number of lands they control.

This land enters tapped.

When this land enters, you gain 1 life.

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

Choose target creature. Whenever that creature is dealt damage this turn, it deals that much damage to each other creature and each player.

As this enchantment enters, choose odd or even. (Zero is even.)

Each creature with mana value of the chosen quality has haste.

Each creature without mana value of the chosen quality enters tapped.

Target player draws two cards and loses 2 life.

This land enters tapped.

When this land enters, you gain 1 life.

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

Indestructible

Whenever this creature is dealt damage, it deals that much damage to target opponent.

{2}{R}, {T}: This creature fights another target creature.

Breath of Malfegor deals 5 damage to each opponent.

Any player may have Browbeat deal 5 damage to them. If no one does, target player draws three cards.

You may exile a red card from your hand rather than pay this spell's mana cost.

Cave-In deals 2 damage to each creature and each player.

Chaotic Backlash deals damage to target player equal to twice the number of white and/or blue permanents they control.

This land enters tapped.

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

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

Sacrifice this artifact: Draw a card.

{X}: This creature deals X damage to each creature and each player. Spend only black mana on X.

{T}: Add one mana of any color.

Crew 3 (Tap any number of creatures you control with total power 3 or more: This Vehicle becomes an artifact creature until end of turn.)

Menace, deathtouch

When this creature enters, each player loses a third of their life, rounded up.

Enchant creature

Enchanted creature has lifelink and "Whenever a creature an opponent controls dies, put a +1/+1 counter on this creature." (Damage dealt by a creature with lifelink also causes its controller to gain that much life.)

Choose odd or even. Exile each creature with mana value of the chosen quality. (Zero is even.)

Flying

Haste (This creature can attack and {T} as soon as it comes under your control.)

Whenever this creature deals combat damage to a player, put two +1/+1 counters on it.

Enchant creature

When this Aura enters, it deals 2 damage to enchanted creature.

At the beginning of your upkeep, this Aura deals 4 damage to enchanted creature.

Until end of turn, target creature gains "When this creature dies, return it to the battlefield tapped under its owner's control with a +1/+1 counter on it."

This artifact enters tapped.

{T}: Add two mana of different colors.

Flame Wave deals 4 damage to target player or planeswalker and each creature that player or that planeswalker's controller controls.

{T}: Add {R}. Put a stash counter on this artifact.

{T}, Sacrifice this artifact: Add X mana of any one color, where X is the number of stash counters on this artifact.

Choose one —

• You draw two cards and you lose 2 life.

• Creatures your opponents control get -1/-1 until end of turn.

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

{2}, {T}, Sacrifice this artifact: Draw two cards.

Inferno deals 6 damage to each creature and each player.

Enchant creature or planeswalker you control

When enchanted permanent dies or is put into exile, return that card to the battlefield under your control.

Trample

Frenzied Rampage — At the beginning of combat on your turn, choose an opponent at random. This creature attacks that player this combat if able.

When this creature dies, it deals 4 damage to target opponent chosen at random.

Spectacle {R} (You may cast this spell for its spectacle cost rather than its mana cost if an opponent lost life this turn.)

Exile the top two cards of your library. Until the end of your next turn, you may play those cards.

Haste; fear (This creature can't be blocked except by artifact creatures and/or black creatures.)

Whenever this creature deals combat damage to a player, put a charge counter on it.

At the beginning of your end step, this creature deals damage equal to the number of charge counters on it to each opponent.

When this creature enters, it deals 2 damage to each creature and each player.

{T}: Add {C}.

{1}, {T}, Sacrifice this artifact: Draw a card.

First strike (This creature deals combat damage before creatures without first strike.)

Whenever an opponent casts a white or blue instant or sorcery spell, this creature deals 2 damage to that player.

({T}: Add {R}.)

Companion — Your starting deck contains only cards with odd mana values and land cards. (If this card is your chosen companion, you may put it into your hand from outside the game for {3} as a sorcery.)

If a source you control with an odd mana value would deal damage to a permanent or player, it deals double that damage to that permanent or player instead.

Flying

{T}: Add one mana of any color.

As this enchantment enters, choose Khans or Dragons.

• Khans — At the beginning of your upkeep, exile the top card of your library. Until end of turn, you may play that card.

• Dragons — Whenever a creature you control leaves the battlefield, this enchantment deals 1 damage to any target.

Target player draws two cards and loses 2 life.

You draw two cards, lose 2 life, then create a Blood token. (It's an artifact with "{1}, {T}, Discard a card, Sacrifice this token: Draw a card.")

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

{B}{R}, {T}, Sacrifice this artifact: Draw a card.

This land enters tapped.

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

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

{B}{R}: This artifact becomes a 3/1 black and red Devil artifact creature with first strike until end of turn.

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

{B/R}{B/R}{B/R}{B/R}, {T}, Sacrifice this artifact: Draw two cards.

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

Scry 2, then draw two cards. You lose 2 life. (To scry 2, look at the top two cards of your library, then put any number of them on the bottom and the rest on top in any order.)

Target opponent may have Risk Factor deal 4 damage to them. If that player doesn't, you draw three cards.

Jump-start (You may cast this card from your graveyard by discarding a card in addition to paying its other costs. Then exile this card.)

First strike

Whenever another creature dies, you may put a +1/+1 counter on this creature.

Haste

Renown 1 (When this creature deals combat damage to a player, if it isn't renowned, put a +1/+1 counter on it and it becomes renowned.)

Whenever an opponent casts a noncreature spell, if this creature is renowned, this creature deals 2 damage to that player.

Choose a color. Searing Rays deals damage to each player equal to the number of creatures of that color that player controls.

When this creature dies, it deals 2 damage to each opponent and you gain 2 life.

Menace

At the beginning of your upkeep, reveal the top card of your library. Any opponent may have you put that card into your graveyard. If a player does, this creature deals damage to that player equal to that card's mana value. Otherwise, put that card into your hand.

Sorin's Vengeance deals 10 damage to target player or planeswalker and you gain 10 life.

This creature enters with a +1/+1 counter on it.

When this creature enters, move all +1/+1 counters from all creatures onto it.

Sliver creatures you control have "Whenever this creature is dealt damage, it deals that much damage to target player or planeswalker."

Steam Blast deals 2 damage to each creature and each player.

When this creature enters, it deals 2 damage to each opponent.

Indestructible

As this creature enters, choose a player.

Whenever this creature is dealt damage, it deals that much damage to the chosen player.

{T}: This creature deals 1 damage to itself.

At the beginning of each player's upkeep, this enchantment deals 2 damage to that player.

If a player would gain life, that player gains no life instead.

Until end of turn, target creature gets +2/+0 and gains "When this creature dies, return it to the battlefield tapped under its owner's control."

({T}: Add {B}.)

Syphon Soul deals 2 damage to each other player. You gain life equal to the damage dealt this way.

Changeling (This card is every creature type.)

Whenever an opponent casts a spell, you may put a +1/+1 counter on this creature.

Until end of turn, target creature gains "When this creature dies, return it to the battlefield tapped under its owner's control with a +1/+1 counter on it."

Destroy target creature. If you control an artifact, Unlicensed Disintegration deals 3 damage to that creature's controller.

This land enters tapped.

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

Kicker {8}{R} (You may pay an additional {8}{R} as you cast this spell.)

This spell can't be countered.

Urza's Rage deals 3 damage to any target. If this spell was kicked, instead it deals 10 damage to that permanent or player and the damage can't be prevented.

This spell can't be countered.

Volcanic Fallout deals 2 damage to each creature and each player.

Return target instant or sorcery card from your graveyard to your hand. Volcanic Vision deals damage equal to that card's mana value to each creature your opponents control. Exile Volcanic Vision.

Protection from red

Flying

Ward—Discard a card. (Whenever this creature becomes the target of a spell or ability an opponent controls, counter it unless that player discards a card.)

Whenever this creature deals combat damage to a player, put that many +1/+1 counters on it.