ooh, very original, i really like the idea, but it'd be very op if added. Maybe you'd have a limited amount of time before you explode or smth, and you need to keep consuming enemies to avoid dying, maybe the damage is too much since the sword only deals 1 damage (by default).
Thanks for your idea!!1!
(tbh i don't have much to say, it's something that i never thought of adding lol)