When Michael Devlin was indisposed, Abbot himself donned the armor he had built and attacked Dr. Zero. Dr. Zero bested and injured him. The Abbot died building Devlin's newest armor so he could fight Zero and then oppose Henry Clerk. 
Powers and Abilities
He has the normal abilities all Shadows possess, including an enhanced lifespan. His Shadow ability is an innate gift with mechanics. In addition to building traditional machines with limited resources, the Abbot can also imbue his creations with his own Shadow-strength, creating armors that (when wielded by humans) can channel their mental strength into Shadow-like abilities.