Whenever this creature or another creature dies, target player loses 1 life and you gain 1 life.

Flying When this creature enters, target player loses 2 life and you gain 2 life.

Whenever this creature or another creature or planeswalker you control dies, each opponent loses 1 life and you gain 1 life.

Deathtouch Whenever another creature you control enters, you gain 1 life. Whenever another creature you control dies, each opponent loses 1 life.

Flying When this creature enters, each opponent 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.

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.

Offspring {B} (You may pay an additional {B} as you cast this spell. If you do, when this creature enters, create a 1/1 token copy of it.) Flying At the beginning of your upkeep, reveal the top card of your library and put that card into your hand. You lose life equal to its mana value.

Flying When this creature dies, learn. (You may reveal a Lesson card you own from outside the game and put it into your hand, or discard a card to draw a card.)

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.

Target player draws two cards and loses 2 life.

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.

Flying At the beginning of your end step, if you gained or lost life this turn, surveil 1. (Look at the top card of your library. You may put it into your graveyard.)

Flying This creature can't block. Blood Drain — {1}{B}, Pay 1 life, Sacrifice this creature: Draw a card.

As an additional cost to cast this spell, sacrifice a creature. Draw two cards.

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

This artifact enters tapped. {T}: Add {B}.

{T}: Add one mana of any color in your commander's color identity. Sacrifice this artifact: Draw a card.

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

This artifact enters tapped. {T}: Add {W}.

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

You have no maximum hand size. {T}: Add {C}.

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

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

{T}, Sacrifice this land: Search your library for a basic land 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 {C}. {T}: Add {W}. Spend this mana only to cast a creature spell. {1}{W}, {T}, Sacrifice this land: Look at the top six cards of your library. You may reveal a Bat, Bird, Mouse, or Rabbit card from among them and put it into your hand. Put the rest on the bottom of your library in a random order.

{T}: Add {C}. {T}: Add {B}. Spend this mana only to cast a creature spell. {1}{B}, {T}, Sacrifice this land: Return target Bat, Lizard, Rat, or Squirrel card from your graveyard to your hand.

This land enters tapped. When this land enters, return a land you control to its owner's hand. {T}: Add {W}{B}.

This land enters tapped. {T}: Add {W} or {B}.

This land enters tapped. {T}: Add one mana of any color in your commander's color identity. When that mana is spent to cast a creature spell that shares a creature type with your commander, scry 1. (Look at the top card of your library. You may put that card on the bottom.)

({T}: Add {W}.)

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

As this land enters, you may reveal a Plains or Swamp card from your hand. If you don't, this land enters tapped. {T}: Add {W} or {B}.

({T}: Add {W} or {B}.) This land enters tapped.

({T}: Add {B}.)

Flying, lifelink When this creature enters, look at target opponent's hand. You may exile a nonland card from it until this creature leaves the battlefield.

Destroy target creature.

Destroy target artifact, enchantment, or planeswalker.

Destroy target creature or enchantment.

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

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.

Gift a card (You may promise an opponent a gift as you cast this spell. If you do, they draw a card before its other effects.) Destroy all creatures. If the gift was promised, return a creature card put into your graveyard this way to the battlefield under your control.

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.)

(Gain the next level as a sorcery to add its ability.) If you would gain life, you gain that much life plus 1 instead. {3}{W}: Level 2 Whenever you gain life, put a +1/+1 counter on target creature you control. {4}{W}: Level 3 When this Class becomes level 3, return target creature card from your graveyard to the battlefield. You gain life equal to that creature's toughness.

Each opponent loses two times X life. You gain life equal to the life lost this way.

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.

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

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

Flying, deathtouch Whenever you gain life, this creature gets +1/+1 until end of turn.

Flying Whenever this creature attacks, you gain 1 life.

Flying, lifelink At the beginning of your end step, if you descended this turn, scry 1. (You descended if a permanent card was put into your graveyard from anywhere.)

Whenever one or more creature cards leave your graveyard, create a 1/1 black Bat creature token with flying.

Flying Whenever a creature an opponent controls dies, you create a Blood token. (It's an artifact with "{1}, {T}, Discard a card, Sacrifice this token: Draw a card.") Whenever you sacrifice an artifact, put a +1/+1 counter on this creature and you gain 1 life.