Krugar of the Broken Mirror

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. Exile the tokens at end of combat.)
Myraid tokens aren't legendary.
Whenever a token you control leaves the
battlefield and wasn't sacrificed, each opponent
loses 1 life.