Shif, fairy of the ghoti

Flash

You may exile this card from the graveyard, target fish creature you control: it gets +1/+1 until end turn

During the upkeep of the next turn, whenever this card was exiled: put it to the battlefield

During opponent main phase, whenever this card was put on the battlefield at the same turn: put creatures you control to the graveyard (including this card), put 1 fish creature from your library to the battlefield with total mana value of creatures put to the graveyard