Mergo's Wetnurse

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.)
Whenever one or more creature tokens you
control leave the battlefield, draw a card.
"Every Great One loses its child, and then yearns for
a surrogate..."