Tasha's Polymorph

Choose a non-legendary creature. Other non-legendary creatures entering the battlefield
this turn, enter as a copy of the chosen creature instead. If you control both commanders you
may create a token copy of that creature as well.
Spell Mastery—If there are seven or more
instants and/or sorceries in your graveyard those copies enter as a 1/1 instead.
"I made this spell first, not Mordenkainen" ~Tasha