isperia

Flying When this creature enters, return a creature you control to its owner's hand.

Flying Whenever the fourth spell of a turn is cast, flip Erayo.

Whenever an opponent casts their first spell each turn, counter that spell.

Defender (This creature can't attack.) Flying Transmute (, Discard this card: Search your library for a card with the same mana value as this card, reveal it, put it into your hand, then shuffle. Transmute only as a sorcery.)

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.

Each player can't cast more than one spell each turn.