Necrosynthesis

Vigilance Adeline's power is equal to the number of creatures you control. Whenever you attack, for each opponent, create a 1/1 white Human creature token that's tapped and attacking that player or a planeswalker they control.

When this creature enters, you may search your library for a basic Plains card, reveal it, put it into your hand, then shuffle. Coven — 1WW: Transform this creature. Activate only if you control three or more creatures with different powers.

Disturb 4WW (You may cast this card from your graveyard transformed for its disturb cost.)

When another creature you control dies, transform this creature.

Target creature you control gets +2/+0 and gains lifelink until end of turn. When that creature dies this turn, create a 1/1 white Spirit creature token with flying.

When this enchantment enters, exile target nonland permanent an opponent controls until this enchantment leaves the battlefield.

Target creature gets +2/+2 until end of turn. If it's a Human, instead it gets +3/+3 and gains indestructible until end of turn.

Whenever this creature enters or transforms into Brutal Cathar, exile target creature an opponent controls until this creature leaves the battlefield. Daybound (If a player casts no spells during their own turn, it becomes night next turn.)