It combos off on its own with a Blood Artist, Butcher Ghoul, and a card that makes a token when a creature dies, including Nest of Scarabs, Pawn of Ulamog, and Sifter of Skulls
Marcy: Probably one of the things people know about Final Fantasy that haven't really even played any of them, Summons really came into their own in Final Fantasy VII, becoming big cinematic set pieces, one of which is the above-named card
Invoke Despair Invoke Despair is a killer sorcery for any deck that can consistently get to 4 black mana by turn 5 or 6
It also becomes that type too
While I can imagine situations where the ability is amazing and allows you to kill two opponents out of nowhere and win the game, this still requires getting in combat damage, not just with a single creature, but with your entire team