Eris, Roar of the Storm

Description

Eris, Roar of the Storm (OTC-5 foil) is a legendary Elemental Warlock creature from Outlaws of Thunder Junction Commander. It reduces its casting cost based on the number of different mana values among instants and sorceries in your graveyard and has flying and prowess. Whenever you cast your second spell each turn, it creates a 4/4 red Dragon Elemental token with flying and prowess, supporting spell-heavy decks and token generation.