Riddleform

(T: Add U.)

Untap target creature. It gets +2/+2 until end of turn and can block an additional creature this turn.

Double strike Eternalize 3WW (3WW, Exile this card from your graveyard: Create a token that's a copy of it, except it's a 4/4 black Zombie Cat with no mana cost. Eternalize only as a sorcery.)

Flying, vigilance 2W, T: Exile another target creature. Return that card to the battlefield under its owner's control at the beginning of the next end step. 2W, T, Exert this creature: Exile another target creature until this creature leaves the battlefield. (An exerted creature won't untap during your next untap step.)

Flying Cycling 2 (2, Discard this card: Draw a card.)

Flying When this creature enters, you gain 3 life.

Other Horses you control have indestructible. At the beginning of each end step, if you gained life this turn, create a 5/5 white Horse creature token.

Flying Whenever this creature attacks, untap target creature you control.