Defender
Whenever you surveil, put a +1/+1 counter on Thoughtbound Phantasm.
As long as Thoughtbound Phantasm has three or more +1/+1 counters on it, it can attack as though it didn't have defender.

Whenever you cast a spell with converted mana cost 5 or greater, draw a card.

Sacrifice two creatures: Create a 3/1 red Beast creature token named Carnivore.

Put three -1/-1 counters on target creature. Its controller loses 3 life unless they sacrifice another nonland permanent or discards a card.

When Trial of Ambition enters the battlefield, target opponent sacrifices a creature.
When a Cartouche enters the battlefield under your control, return Trial of Ambition to its owner's hand.

Reach (This creature can block creatures with flying.)
When Turret Ogre enters the battlefield, if you control another creature with power 4 or greater, Turret Ogre deals 2 damage to each opponent.

Deathtouch

Target creature gets -3/-3 until end of turn. You lose 3 life.

Underworld Charger can't block.
Escape—, Exile three other cards from your graveyard. (You may cast this card from your graveyard for its escape cost.)
Underworld Charger escapes with two +1/+1 counters on it.

Target creature gets -3/-3 until end of turn. You may tap any number of untapped Vampire creatures you control. If you do, put a +1/+1 counter on each of those Vampires.

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.)
Flying, first strike
Whenever this creature mutates, you may cast target noncreature card with converted mana cost 3 or less from your graveyard without paying its mana cost.

Enchant artifact
When enchanted artifact is put into a graveyard, you gain 6 life.

Partner with Gorm the Great (When this creature enters the battlefield, target player may put Gorm into their hand from their library, then shuffle.)
Deathtouch
Whenever Virtus the Veiled deals combat damage to a player, that player loses half their life, rounded up.

Creature tokens get -2/-2.

Whipflare deals 2 damage to each nonartifact creature.

Wingfold Pteron enters the battlefield with your choice of a flying counter or a hexproof counter on it. (A creature with hexproof can't be the target of spells or abilities your opponents control.)