Mirage, Master of Illusion

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 he or she
controls. If one or more tokens are created this way,
exile the tokens at end of combat.)
During a combat phase you attack more than one player, other creatures you control named
"Mirage, Master of Illusion" get +1/+1 for each defending player.