Aurora Shifter (Extended Art) (Ripple Foil) [Modern Horizons 3 Commander]

Whenever Aurora Shifter deals combat damage to a player, you get that many E.

At the beginning of combat on your turn, you may pay EE. When you do, Aurora Shifter becomes a copy of another target creature you control, except it has this ability and “Whenever this creature deals combat damage to a player, you get that many E.”