Flying

Whenever this creature deals combat damage to a player, you may destroy target artifact that player controls.

This creature can't be blocked by more than one creature.

Whenever this creature deals combat damage to a player, destroy target artifact or enchantment that player controls.

Flying

Whenever this creature deals combat damage to a player, create a token that's a copy of target artifact that player controls.

Ravenous (This creature enters with X +1/+1 counters on it. If X is 5 or more, draw a card when it enters.)

Trample

Heavy Power Hammer — Whenever this creature deals combat damage to a player, destroy target artifact or enchantment that player controls.

Flying, trample

Whenever this creature deals combat damage to a player, you get that many (energy counters).

Whenever this creature deals combat damage to a creature, destroy that creature at end of combat.

Whenever this creature deals combat damage to a player, you may draw a card.

Whenever a creature you control enters, you may destroy target artifact or enchantment.

Ninjutsu

This creature enters with a deathtouch counter on it.

Whenever this creature deals combat damage to a player, you may remove a deathtouch counter from it. When you do, exile target artifact or enchantment that player controls.

Other Cats you control get +1/+1 and have protection from Dogs.

Whenever one or more Cats you control deal combat damage to a player, destroy up to one target artifact or enchantment that player controls.

When this creature enters, you may destroy target artifact or enchantment.

Ninjutsu (, Return an unblocked attacker you control to hand: Put this card onto the battlefield from your hand tapped and attacking.)

Whenever this creature deals combat damage to a player, you may return target creature that player controls to its owner's hand.

Myriad, myriad (Whenever this creature attacks, for each opponent other than defending player, you may create a token that's a copy of this creature that's tapped and attacking that player or a planeswalker they control. Then do it again. Exile the tokens at end of combat.)

Whenever this creature deals combat damage to a player, put a +1/+1 counter on target creature you control.

Trample, protection from enchantments

: Monstrosity 3. (If this creature isn't monstrous, put three +1/+1 counters on it and it becomes monstrous.)

Whenever this creature deals combat damage to a player, if this creature is monstrous, destroy target enchantment that player controls.

Whenever this creature deals combat damage to a player, you may sacrifice it. If you do, gain control of target creature that player controls. (This effect lasts indefinitely.)

Morph (You may cast this card face down as a 2/2 creature for . Turn it face up any time for its morph cost.)

Trample

Leatherhead enters with a hexproof counter on her.

Whenever Leatherhead deals combat damage to a player, you may remove a counter from her. When you do, destroy target artifact or enchantment that player controls.

Mutate (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.)

Reach, trample

Whenever this creature mutates, destroy target artifact or enchantment an opponent controls.

Flying

Metalcraft — Whenever this creature deals combat damage to a player, if you control three or more artifacts, that player mills four cards.

Sneak (You may cast this spell for if you also return an unblocked attacker you control to hand during the declare blockers step. He enters tapped and attacking.)

Whenever Donatello deals combat damage to a player, create a token that's a copy of target artifact you control.