Yuriaq, Scarjeweller

Haste, Menace

{t}, put a - 1/-1 counter on target creature: It gains
myriad until end of turn. (Whenever it attacks, for
each opponent other than defending player, you may
put a token that's a copy of that creature onto the battlefield tapped and attacking that player or a planeswalker they control. Exile the tokens at the end
of combat.)