Jakku the Reckless

Haste
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 Jakku the Relentless attacks, defending player sacrifices an artifact or land.