The Fabled Behilmoth - Battles of Legend: Monster Mayhem (BLMM)

If this card is in your hand: You can discard 2 or more "Fabled" monsters, including this card, and if you do, Special Summon 1 "Fabled" Synchro Monster from your Extra Deck whose Level equals the discarded monsters' total original Levels (this is treated as a Synchro Summon). If a card(s) is sent from your hand to the GY, while this card is in your GY (except during the Damage Step): You can banish this card; Special Summon 1 "Fabled" monster from your hand. You can only use each effect of "The Fabled Behilmoth" once per turn.