Progenitor Elemental

Myriad (Whenever this creature attacks, for each
opponent other than defending player, you may create a token that's a copy of this creature that's tapped and attacking that player or a planeswalker they control. If
one or more tokens are created this way, exile the tokens
at end of combat.)
Whenever Progenitor Elemental deals combat
damage to a player, it can't be exiled this turn.