Greaseball Bomb

 is Bone.

Obtaining

 * Dropped by
 * Greaseball

Uses

 * Used in the craft of
 * Air Destroyer
 * Ancestral Treechnid Dragobutt
 * Cauldini Boots
 * Cauldini Mask
 * Crocodyl Chief Shield
 * Cross Strich Dragobutt
 * Daguiero's Daggers
 * Ilyzaelle Dragobutt
 * Magik Riktus Big Top Key
 * Riktus Mask
 * Shadow Dragobutt
 * Shin Larva Dragobutt