Enchant creature

Enchanted creature has hexproof and can't be blocked by more than one creature.

Menace, trample

When Alpha Deathclaw enters the battlefield or becomes monstrous, destroy target permanent.

: Monstrosity 4. (If this creature isn't monstrous, put four +1/+1 counters on it and it becomes monstrous.)

: Target Kavu creature gets -1/+1 until end of turn.

Enchant creature

Enchanted creature gets +2/+2 for each other creature on the battlefield that shares a creature type with it.

Whenever Assembled Alphas blocks or becomes blocked by a creature, Assembled Alphas deals 3 damage to that creature and 3 damage to that creature's controller.

Flash (You may cast this spell any time you could cast an instant.)

When Briarpack Alpha enters the battlefield, target creature gets +2/+2 until end of turn.

When Gray Merchant of Alphabet enters the battlefield, choose a letter. For each creature you control that has the chosen letter in its name, you gain 1 life and each opponent loses 1 life.

As Indominus Rex, Alpha enters the battlefield, discard any number of creature cards. It enters with a flying counter on it if a card discarded this way has flying. The same is true for first strike, double strike, deathtouch, hexproof, haste, indestructible, lifelink, menace, reach, trample, and vigilance.

When Indominus Rex enters the battlefield, draw a card for each counter on it.

Whenever a creature you control becomes blocked, it gets +1/+1 until end of turn.

: Target creature you control gains trample until end of turn. (It can deal excess combat damage to the player or planeswalker it's attacking.)

Whenever a Werewolf enters the battlefield under your control, you may transform it.

At the beginning of each upkeep, if a player cast two or more spells last turn, transform Vildin-Pack Alpha.