Mace Spheres

From Doom Wiki

Mace Spheres are the small ammo type used to power Heretic's Firemace. They provide the player with 20 shots (30 on skills 1 and 5).

Heretic ammo
Wand Crystal	Ethereal Arrows	Claw Orb	Lesser Runes	Flame Orb	Mace Spheres
Crystal Geode	Quiver of Ethereal Arrows	Energy Orb	Greater Runes	Inferno Orb	Pile of Mace Spheres