Defender
Whenever this creature blocks a creature, that creature doesn't untap during its controller's next untap step.

Enchant creature
Enchanted creature gets +3/+3.
Umbra armor (If enchanted creature would be destroyed, instead remove all damage from it and destroy this Aura.)

Devour 3 (As this creature enters, you may sacrifice any number of creatures. It enters with three times that many +1/+1 counters on it.)

Creatures with power less than this creature's power can't block it.
This creature gets +1/+1 for each Aura on the battlefield.

Creatures can't attack you unless their controller pays for each creature they control that's attacking you.

: Return two target cards from an opponent's graveyard to their hand. Destroy target artifact or enchantment.

Flying
When this creature enters, each opponent discards a card.

Haste (This creature can attack and as soon as it comes under your control.)
Cascade (When you cast this spell, exile cards from the top of your library until you exile a nonland card that costs less. You may cast it without paying its mana cost. Put the exiled cards on the bottom in a random order.)

Flying
: Regenerate this creature.
Cascade (When you cast this spell, exile cards from the top of your library until you exile a nonland card that costs less. You may cast it without paying its mana cost. Put the exiled cards on the bottom in a random order.)

Devour 1 (As this creature enters, you may sacrifice any number of creatures. It enters with that many +1/+1 counters on it.)
This creature has flying and trample if it devoured a creature.

Draw three cards.

When this creature enters, you may search your library for a basic land card, put it onto the battlefield tapped, then shuffle.

Enchant creature
Enchanted creature has ": This creature deals damage equal to its power to target creature. That creature deals damage equal to its power to this creature."

Flying, vigilance

Choose two target creatures that share no creature types. Those creatures fight each other. (Each deals damage equal to its power to the other.)

When this creature enters, create two 1/1 red Goblin creature tokens.

Devour 2 (As this creature enters, you may sacrifice any number of creatures. It enters with twice that many +1/+1 counters on it.)
: This creature gains trample until end of turn.

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 draw a card.

As this creature enters, it becomes your choice of a 3/3 creature, a 2/2 creature with flying, or a 1/6 creature with defender.

Flying
Other blue creatures you control get +1/+1.
Other black creatures you control get +1/+1.

Hexproof (This creature can't be the target of spells or abilities your opponents control.)
Whenever a creature dies, put a +1/+1 counter on this creature.

Reach
When this creature dies, create a 2/4 black Spider creature token with reach.

Ninjutsu (, Return an unblocked attacker you control to hand: Put this card onto the battlefield from your hand tapped and attacking.)
You may have this creature enter as a copy of any creature on the battlefield, except it's a Ninja in addition to its other creature types.

, : Return target enchantment card from your graveyard to your hand.

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, that player discards two cards.

Whenever a source an opponent controls deals damage to you, if this artifact is untapped, you may draw a card.

Search your library for up to three Aura cards with different names, reveal them, put them into your hand, then shuffle.

Whenever you cast an enchantment spell, create a 4/4 white Angel creature token with flying.

Trample, lifelink
Spells you cast that target this creature cost less to cast.
Spells your opponents cast that target this creature cost more to cast.

As long as this creature is enchanted, it gets +2/+2 and has flying, first strike, and trample.

Devour X, where X is the number of creatures devoured this way (As this creature enters, you may sacrifice any number of creatures. It enters with X +1/+1 counters on it for each of those creatures.)

Devour 2 (As this creature enters, you may sacrifice any number of creatures. It enters with twice that many +1/+1 counters on it.)
At the beginning of your upkeep, create a 1/1 green Saproling creature token for each +1/+1 counter on this creature.

When this creature dies, create two 2/2 green Ooze creature tokens. They have "When this token dies, create two 1/1 green Ooze creature tokens."

Flying
Whenever you cast an enchantment spell, put a +1/+1 counter on each creature you control.

Whenever an Aura becomes attached to this creature, create two 1/1 green Saproling creature tokens.

Target opponent loses 2 life for each Swamp you control. Last Stand deals damage to target creature equal to the number of Mountains you control. Create a 1/1 green Saproling creature token for each Forest you control. You gain 2 life for each Plains you control. Draw a card for each Island you control, then discard that many cards.