Arcane Ritual

Instant and sorcery spells you cast cost {1} less to cast
Tap three creatures you control: Put a 5/5 Demon creature token with flying onto the battlefield. Activate this ability only if an instant or sorcery spell was cast this turn and only once each turn
Come forth, Sarthorael, be freed of your phantasmal shackles, grant this mortal world your unholy blessing!
-Arcanite Cultist