Whenever this creature becomes blocked, it gets -1/-1 until end of turn for each creature blocking it beyond the first.

Deathtouch (Any amount of damage this deals to a creature is enough to destroy it.)
, Sacrifice another creature: You gain life equal to the sacrificed creature's toughness.
, Sacrifice another creature: Exile target nonland permanent. Activate only if you have at least 10 life more than your starting life total.

Destroy target blocking creature. Creatures that were blocked by that creature this combat gain trample until end of turn.

Destroy all creatures, then return a creature card put into a graveyard this way to the battlefield under your control. It's a black Zombie in addition to its other colors and types. Exile Necromantic Selection.

: Add .
, , Sacrifice this artifact: Destroy target permanent.

Whenever a creature with power 1 or less is put into your graveyard from the battlefield, you may return that card to the battlefield at the beginning of the next end step if Shirei is still on the battlefield.

Menace
When this creature enters, you get (two energy counters).
Whenever this creature attacks, you may pay . If you do, another target attacking creature gets +1/+0 and gains menace until end of turn.

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

Put target creature on top of its owner's library, then fateseal 2. (To fateseal 2, look at the top two cards of an opponent's library, then put any number of them on the bottom of that player's library and the rest on top in any order.)

Trample

Defender (This creature can't attack.)
When this creature enters, create a 1/1 blue Squid creature token with islandwalk. (It can't be blocked as long as defending player controls an Island.)

Outlast (, : Put a +1/+1 counter on this creature. Outlast only as a sorcery.)
Each creature you control with a +1/+1 counter on it has first strike.

Creatures you control get +1/+2 until end of turn. Untap those creatures.
Basic landcycling (, Discard this card: Search your library for a basic land card, reveal it, put it into your hand, then shuffle.)

Target creature gains deathtouch until end of turn and must be blocked this turn if able.
Flashback (You may cast this card from your graveyard for its flashback cost. Then exile it.)

Haste
You may activate abilities of other creatures you control as though those creatures had haste.
: When you next activate an ability that isn't a mana ability this turn by spending four or more mana to activate it, copy that ability. You may choose new targets for the copy.

: Target creature you control with toughness less than this creature's power gains flying until end of turn. Destroy that creature at the beginning of the next end step.

, : Target creature gets +2/+2 until end of turn.
Channel — , Discard this card: Target creature gets +4/+4 until end of turn.

Flying
When this creature enters and whenever one or more creature tokens you control deal combat damage to a player, this creature becomes prepared. (While it's prepared, you may cast a copy of its spell. Doing so unprepares it.)

When this creature enters, create a 1/1 black Rat creature token with "This token can't block."
Whenever another creature you control dies, put a +1/+1 counter on this creature.

Untap target creature. It gets +2/+2 and gains lifelink until end of turn.