Thermite grenade



A thermite grenade is a detonative device using thermite, a pyrotechnic compound made from metal powder and metal oxide.

Infamously, pulls one out at the end of the first TMNT comic book, intending to kill the  along with himself, instead of honorably committing seppuku as  had offered him. Before Saki can kill the lot of them, throws his Bō at him, knocking him off of the rooftop and ensuring that Saki alone was the victim of the grenade.