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

When this creature enters, choose one —
• Put a +1/+1 counter on this creature.
• Return target artifact or enchantment card from your graveyard to your hand.

Flash
Flying
When this creature enters, switch target creature's power and toughness until end of turn.

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

When this creature enters, it deals damage to target creature an opponent controls equal to the number of Goblins you control.

Menace
Whenever you sacrifice a creature, you may pay . If you do, draw a card. ( can be paid with either or .)
, Sacrifice a creature: Kels gains indestructible until end of turn.

When this creature enters, create a 1/1 green Elf Warrior creature token.

When this creature enters, draw a card for each creature you control with a +1/+1 counter on it.

Whenever you cast a creature spell with power 4, 5, or 6, this enchantment deals 4 damage to any target.
Whenever you cast a creature spell with power 7 or greater, this enchantment deals 4 damage to each opponent and each creature and planeswalker they control.

Return all creatures to their owners' hands except for Krakens, Leviathans, Octopuses, and Serpents.

: Add .
, , Sacrifice this artifact: Draw two cards.

: Create X 1/1 red Goblin creature tokens, where X is the number of Goblins you control.

: Target creature gets +5/+5 and gains trample until end of turn. (It can deal excess combat damage to the player or planeswalker it's attacking.)

Trample (This creature can deal excess combat damage to the player or planeswalker it's attacking.)
At the beginning of each end step, if this creature attacked or blocked this turn, its owner shuffles it into their library.

, : Search your library for a card named Festering Newt or Bubbling Cauldron, put it onto the battlefield tapped, then shuffle.

, , Sacrifice this creature: It deals X damage to any target.

Haste
Whenever a creature you control attacks, this creature deals 1 damage to the player or planeswalker it's attacking.

Create four 1/1 white Dog creature tokens.

When this creature dies, return target instant or sorcery card from your graveyard to your hand.

This spell costs less to cast if a creature died this turn.
Flying, deathtouch

Flame Lash deals 4 damage to any target.

When this creature enters, return a nonland permanent you control to its owner's hand.

Whenever an enchantment you control enters, create a 2/2 white Cat creature token. If that enchantment is an Aura, you may attach it to the token.

Flying
When this creature enters, target opponent discards a card.
Whenever an opponent discards a card, that player loses 2 life.

Create two 1/1 red Devil creature tokens. They have "When this token dies, it deals 1 damage to any target."

As an additional cost to cast this spell, sacrifice a creature.
You draw cards equal to the sacrificed creature's power, then you gain life equal to its toughness.

Flying
, Sacrifice this creature: Target creature gets -2/-2 until end of turn.

Enchant creature
Enchanted creature gets +2/+2 and has lifelink.

This creature attacks each combat if able.
This creature can't be blocked by Walls.

: This creature deals 4 damage to target creature. Activate only if this creature's power is 4 or greater.

Flying
Activated abilities of creatures your opponents control can't be activated.

When this creature enters, choose one —
• Return target creature card from your graveyard to your hand.
• Target opponent reveals their hand. You choose a noncreature card from it. That player discards that card.

Vigilance
: Add one mana of any color.

Creatures you control get +2/+1 until end of turn.