Plagued Rusalka

You may have this creature enter as a copy of any creature on the battlefield, except it has "At the beginning of your upkeep, if this creature isn't a token, create a token that's a copy of this creature."

Flying Whenever Isperia deals combat damage to a player, choose a card name. That player reveals their hand. If a card with the chosen name is revealed this way, search your library for a creature card with flying, reveal it, put it into your hand, then shuffle.

Whenever you cast a green creature spell, you may search your library for a creature card, reveal it, then shuffle and put that card on top. Whenever you cast a blue creature spell, reveal the top card of your library. If it's a creature card, put that card into your hand.

Destroy target creature. It can't be regenerated. That creature's controller creates a 3/3 green Frog Lizard creature token.

Destroy target creature or land.

Flying This creature enters with X +1/+1 counters on it.

(T: Add W.)

(B/R can be paid with either B or R.) 3B, Discard a card: Target creature gets -2/-2 until end of turn. 3R: Create a 2/1 red Goblin creature token with haste. Exile it at the beginning of the next end step.