surveil

Defender

When Barrier of Bones enters the battlefield, surveil 1. (Look at the top card of your library. You may put that card into your graveyard.)

Creeping Chill deals 3 damage to each opponent and you gain 3 life.

When Creeping Chill is put into your graveyard from your library, you may exile it. If you do, Creeping Chill deals 3 damage to each opponent and you gain 3 life.

Target creature gets -3/-0 until end of turn.

Surveil 2. (Look at the top two cards of your library, then put any number of them into your graveyard and the rest on top of your library in any order.)

Enchant creature

Enchanted creature gets -2/-2.

Flying

Menace (This creature can't be blocked except by two or more creatures.)

Whenever you surveil, put a +1/+1 counter on Dimir Spybug.

Drowned Catacomb enters the battlefield tapped unless you control an Island or a Swamp.

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

({T}: Add {U}.)

When Lazav, the Multifarious enters the battlefield, surveil 1. (Look at the top card of your library. You may put it into your graveyard.)

{X}: Lazav, the Multifarious becomes a copy of target creature card in your graveyard with converted mana cost X, except its name is Lazav, the Multifarious, it's legendary in addition to its other types, and it has this ability.

All creatures get -1/-1 until end of turn.

Surveil 2. (Look at the top two cards of your library, then put any number of them into your graveyard and the rest on top of your library in any order.)

Flying

When Narcomoeba is put into your graveyard from your library, you may put it onto the battlefield.

Flying

Whenever Nightveil Sprite attacks, surveil 1. (Look at the top card of your library. You may put that card into your graveyard.)

Surveil 2, then draw two cards. Notion Rain deals 2 damage to you. (To surveil 2, look at the top two cards of your library, then put any number of them into your graveyard and the rest on top of your library in any order.)

This spell costs {2} less to cast if it targets a legendary creature.

Destroy target creature.

Surveil 2. (Look at the top two cards of your library, then put any number of them into your graveyard and the rest on top of your library in any order.)

({T}: Add {B}.)

Target opponent reveals their hand. You choose a nonland card from it. That player discards that card.

Surveil 1. (Look at the top card of your library. You may put it into your graveyard.)

Defender

Whenever you surveil, put a +1/+1 counter on Thoughtbound Phantasm.

As long as Thoughtbound Phantasm has three or more +1/+1 counters on it, it can attack as though it didn't have defender.

Return target creature to its owner's hand.

Surveil 1. (Look at the top card of your library. You may put that card into your graveyard.)

({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.