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

Pay : Put a +1/+1 counter on this creature.

Equipped creature has trample and "Whenever this creature deals combat damage to a player, put that many +1/+1 counters on it."

Equip

Trample (This creature can deal excess combat damage to the player or planeswalker it's attacking.)

Whenever this creature deals combat damage to a player, create a Food token. (It's an artifact with ", , Sacrifice this token: You gain 3 life.")

Sliver creatures you control have "Whenever this creature deals combat damage to a player, put a +1/+1 counter on it."

Trample

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

Trample

Toxic 1 (Players dealt combat damage by this creature also get a poison counter.)

Whenever this creature deals combat damage to a player, proliferate. (Choose any number of permanents and/or players, then give each another counter of each kind already there.)

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.

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, put a +1/+1 counter on target creature you control that doesn't have a +1/+1 counter on it.

Whenever this creature deals combat damage to a player, untap target creature or land.

Trample

Whenever a player casts a spell, put a +1/+1 counter on this creature.

Flying, trample

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

Enrage — Whenever this creature is dealt damage, put two +1/+1 counters on it. (It must survive the damage to get the counters.)

Whenever this creature deals combat damage to a creature, that creature becomes a copy of this creature.

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

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

Unlock Ability — Creatures you control with +1/+1 counters on them have reach and trample.

Deathtouch (Any amount of damage this deals to a creature is enough to destroy it.)

Whenever a creature you control with deathtouch deals combat damage to a player, that player gets two poison counters. (A player with ten or more poison counters loses the game.)

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

Trample

Spawn Termagants — Whenever this creature deals combat damage to a player, create that many 1/1 green Tyranid creature tokens.

: This creature deals 1 damage to target creature with flying.

Whenever a creature with flying dealt damage by this creature this turn dies, put a +1/+1 counter on this creature.