Wizards of Thay

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.)
Instant and sorcery spells you cast cost {1} less to
cast.
You may cast sorcery spells as though they had
flash.