When this artifact enters, scry 1, then draw a card.
, , Sacrifice this artifact: You gain 3 life.
When this artifact is put into a graveyard from the battlefield, its owner shuffles it into their library.

Whenever this creature attacks, another target attacking creature gets +0/+2 until end of turn. Untap that creature.

Ninjutsu (, Return an unblocked attacker you control to hand: Put this card onto the battlefield from your hand tapped and attacking.)
Whenever one or more Ninja or Rogue creatures you control deal combat damage to a player, create a Treasure token. (It's an artifact with ", Sacrifice this token: Add one mana of any color.")

Until end of turn, target creature loses all abilities and becomes a blue Frog with base power and toughness 1/1.

Trample
Whenever you get one or more (energy counters), this creature gets +2/+2 until end of turn.

Scry 3, then you may reveal the top card of your library. If a creature card is revealed this way, draw a card.

Draw X cards.

Commander creatures you own have "At the beginning of your upkeep, exile the top card of your library. This creature gets +X/+0 until end of turn, where X is that card's mana value. You may play that card this turn."

Equipped creature gets +2/+0.
Whenever equipped creature dies, draw a card.
Equip or

Flying
When this creature enters, exile up to one other target creature or artifact you control. Return it to the battlefield under its owner's control at the beginning of the next end step.

Whenever this creature becomes the target of a spell, this creature deals 2 damage to that spell's controller.

Undergrowth — When this creature enters, target creature gains vigilance and gets +X/+X until end of turn, where X is the number of creature cards in your graveyard.
This creature can't be blocked by more than one creature.

: Each player loses 1 life.

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.)
Whenever this creature mutates, other creatures you control get +2/+1 until end of turn.

(: Add .)

When this creature enters, tap target creature an opponent controls. That creature doesn't untap during its controller's next untap step.

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

Each creature you control that's a Wolf or a Werewolf enters with an additional +1/+1 counter on it.
−2: Create a 2/2 green Wolf creature token.

Flying
When this creature enters, put target creature card from an opponent's graveyard onto the battlefield under your control. It gains haste. At the beginning of your next end step, exile it.
Persist (When this creature dies, if it had no -1/-1 counters on it, return it to the battlefield under its owner's control with a -1/-1 counter on it.)

Trample
Whenever this creature or another Ally you control enters, you may put a +1/+1 counter on this creature.