Carl's throwable bomb, held ready for the flesh ball and used instead to kill a newborn flesher.
Watching Princess Donut's Magic Missiles chip the Rolling Battle Formation Ball far too slowly, Carl pulls a full-strength hob-lobber and extends his Xistera, hesitant to throw a bomb at all of their allies plus two gods but out of better options.
He never gets to use it on the ball. When the flesher wearing Nami's corpse stands up draped in an oversized dromedarian skin and two more Fleshers attach to it, Carl re-routes the throw and tosses the hob-lobber at the creature instead — killing her and the fleshers all at once with a single blam, and denying the war mages another body.
A full-strength hobgoblin explosive, thrown by hand or launched from a xistera.
Carl's primary weapon in the chapter, spent preventing a new war mage from being born.
Also appears in books you've already read — spoiler-safe to their endings: