Make Ancient Guardian (or at least his second phase) the durability loss reduction on Glass Cutters

[Frashaw27]

Basically, I think it's clear at this point that the Ancient Guardian is heavily made up of Nightmare Fuel from its time in the long forgotten, corrupted ruins. Not only is the black markings a clear indicator of Fuel, but the fact his body is constantly leaking Fuel to spawn shadow tentacles is clear signs of him being mostly Fuel. But why does this matter? Because a certain weapon called the Glass Cutter decreases durability slower against enemies that are Fuel based. Thus I propose that the Ancient Guardian join the ranks of Terrorbeak and Horrorbeak and gain the bonus to the Glass Cutter, or atleast when he hits his 2nd phase.