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.

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.

Equipped creature gets +1/-1. Whenever equipped creature dies, draw two cards. Equip {1}

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.

Flying {7}{B}, {T}, Sacrifice this creature: Target opponent loses 4 life and you gain 4 life.

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

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

As this artifact enters, choose a creature type. Creatures you control of the chosen type get +1/+1. {T}: Add one mana of any color.

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

Bloodthirst 1 (If an opponent was dealt damage this turn, this creature enters with a +1/+1 counter on it.) Flying

Flying {B}, Pay 1 life: This creature gets +1/+1 until end of turn.

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

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.

{T}: Add {C}. {T}: Add {W} or {B}. This land deals 1 damage to you.

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

This land enters tapped unless you control two or fewer other lands. {T}: Add {W} or {B}.

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

{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. {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}.)

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

({T}: Add {B}.)

{T}: Add {C}. {T}: Add {W} or {B}. Activate only if you control a Swamp.

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.

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.

Kicker {3}{B} (You may pay an additional {3}{B} as you cast this spell.) Flying, lifelink If this creature was kicked, it enters with two +1/+1 counters on it.

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

Flying Whenever this creature attacks, you gain 1 life.

Choose two — • Destroy all artifacts. • Destroy all enchantments. • Destroy all creatures with mana value 3 or less. • Destroy all creatures with mana value 4 or greater.

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.

Exile target permanent with mana value 4 or greater.

Mutate {4}{B}{B} (If you cast this spell for its mutate cost, put it over or under target non-Human creature you own. They mutate into the creature on top plus all abilities from under it.) Flash Flying Whenever this creature mutates, destroy target creature or planeswalker an opponent controls.

Destroy target creature.

Destroy target artifact, enchantment, or planeswalker.

Destroy target nonartifact creature.

Choose a creature type. Destroy all creatures that aren't of the chosen type.

Destroy target creature or enchantment.

Destroy target creature with power or toughness 4 or greater.

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

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.

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

Flying When this creature enters, each opponent loses 2 life and you gain 2 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.

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.