Surveil 2, then draw two cards. You lose 2 life. (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.)

At the beginning of your end step, if you gained life this turn, each opponent loses 1 life. At the beginning of your end step, if you gained and lost life this turn, create a 1/1 black Bat creature token with flying. {1}{B}, Pay 2 life: Draw a card.

Flying At the beginning of your end step, if you gained or lost life this turn, look at the top four cards of your library. You may reveal a creature card with power 3 or less from among them and put it into your hand. Put the rest on the bottom of your library in a random order.

Look at twice X cards from the top of your library. Put X cards from among them into your hand and the rest into your graveyard. You lose X life.

Whenever you gain life, put a +1/+1 counter on this creature.

Flying Extort (Whenever you cast a spell, you may pay {W/B}. If you do, each opponent loses 1 life and you gain that much life.)

As long as you've lost life this turn, this creature has flying and vigilance. Whenever you gain life, put a +1/+1 counter on this creature. When this creature dies, put its counters on target creature you control.

Flying Whenever another creature you control enters, you gain 1 life.

Flash When this creature enters, target creature an opponent controls gets -2/-2 until end of turn.

When this enchantment enters, exile target nonland permanent an opponent controls until this enchantment leaves the battlefield.

Enchant player Creatures enchanted player controls get -1/-1.

Constellation — Whenever this creature or another enchantment you control enters, creatures your opponents control get -1/-1 until end of turn.

Flash When this creature enters, choose one — • Target creature an opponent controls gets -1/-1 until end of turn. • Destroy target creature an opponent controls that was dealt damage this turn.

Menace When this creature enters, other creatures get -2/-2 until end of turn. {1}{B}, Discard this card: Target creature gets -2/-2 until end of turn.

Other creatures get -1/-1.

Flying, trample Ward—Discard a card. Creatures your opponents control have base toughness 1.

Menace When Massacre Girl enters, each other creature gets -1/-1 until end of turn. Whenever a creature dies this turn, each creature other than Massacre Girl gets -1/-1 until end of turn.

When this creature enters, creatures your opponents control get -2/-2 until end of turn. Whenever a creature an opponent controls dies, that player loses 2 life.

Gift a Food (You may promise an opponent a gift as you cast this spell. If you do, they create a Food token before its other effects. It's an artifact with "{2}, {T}, Sacrifice this token: You gain 3 life.") Destroy target creature. If the gift wasn't promised, you lose 2 life.

Exile target creature. Its controller may search their library for a basic land card, put that card onto the battlefield tapped, then shuffle.

Destroy all nonland permanents with mana value 1 or less. Cycling {2} ({2}, Discard this card: Draw a card.)

Destroy target creature with power or toughness 4 or greater.

Flash Flying, lifelink When this creature enters, destroy target creature an opponent controls that was dealt damage this turn.

Target creature gets -2/-2 until end of turn. Create a Food token. (It's an artifact with "{2}, {T}, Sacrifice this token: You gain 3 life.")

Sonar Strike deals 4 damage to target attacking, blocking, or tapped creature. You gain 3 life if you control a Bat.

Enchant creature When this Aura enters, target player sacrifices a creature of their choice other than enchanted creature. When enchanted creature is dealt damage, destroy it.

Flying, deathtouch Whenever you gain or lose life during your turn, Bats you control get +1/+0 and gain deathtouch until end of turn. This ability triggers only once each turn.

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 and you create a Treasure token." (It's an artifact with "{T}, Sacrifice this token: Add one mana of any color.")

Flying Whenever another creature you control enters, you gain 1 life.

Whenever you gain life, put a +1/+1 counter on this creature. When this creature dies, return another target non-Bear creature card with mana value less than or equal to this creature's power from your graveyard to the battlefield.

Whenever another creature you control enters, you gain 1 life.

Add {B}{B}{B}.

When this artifact enters, you may search your library for a basic land card, reveal it, then shuffle and put that card on top. {1}, Sacrifice this artifact: Draw a card.

Whenever one or more tokens you control enter, create a 1/1 black Vampire Rogue creature token with lifelink. This ability triggers only once each turn. {1}{B}, Sacrifice another creature or artifact: Draw a card.

Flying Haunt (When this creature dies, exile it haunting target creature.) When this creature enters or the creature it haunts dies, target player loses 2 life and you gain 2 life.

Whenever you gain life, each opponent loses 1 life.

Flying Whenever you create or sacrifice a token, each opponent loses 1 life.

Whenever you gain life, target opponent loses that much life.

Offspring {2}{B} (You may pay an additional {2}{B} as you cast this spell. If you do, when this creature enters, create a 1/1 token copy of it.) Flying This creature can't block. Whenever you gain life, each opponent loses 1 life.

Flying, vigilance At the beginning of your end step, if you gained or lost life this turn, target opponent loses 3 life unless they sacrifice a nonland permanent of their choice or discard a card.

Menace Whenever this creature attacks, each opponent loses X life and you gain X life, where X is the number of other Squirrels, Bats, Lizards, and Rats you control.

({T}: Add {W}.)

This land enters tapped. When this land enters, you gain 1 life. {T}: Add {W} or {B}.

({T}: Add {B}.)

{3}{B}, Exile this card from your graveyard: Return another target creature card from your graveyard to your hand.

Flying When this creature enters, if you gained life this turn, return up to one target creature card from your graveyard to your hand.

Return target creature card from your graveyard to the battlefield. Flashback—Sacrifice three creatures. (You may cast this card from your graveyard for its flashback cost. Then exile it.)

Return up to two target creature cards from your graveyard to your hand. Each opponent loses 2 life and you gain 2 life.

Flying Whenever this creature or another creature you control with flying dies, return another target creature card with lesser mana value from your graveyard to the battlefield.

Flying, vigilance When this creature enters, return target permanent card with mana value 3 or less from your graveyard to your hand. Return that card to the battlefield instead if you control a Mount.