Universal Mechanics
Instinct
Agent of Chaos: Spinal gets 3 skulls upfront and earns extra skulls off throws, Cr. HP, and Spectral Manuals. Searing Skulls bounce off walls, floors, and blocks. Spinal can recycle these bouncing Skulls with Power Devour.
Combat Traits
Spectral Manuals: Spinal can follow up any auto-double with a manual of the same strength. These manuals give Spinal a bonus skull and add a fair bit of Potential Damage.