Shimmerzoa

Flying, haste
When Shimmerzoa enters the battlefield, switch
it's power and toughness until end of turn.
When Shimmerzoa dies, if it attacked this turn, you may put it on top of your library from your graveyard at the beginning of the next upkeep.
When Shimmerzoa dies, if it blocked this turn,
put all creatures it blocked on top of their
owner's library.