A tree hit by a fire ray or explosion should instantly incinerate, provided it’s not marked non-diggable (petrified). Likewise, a tree hit by a disintegration blast should disintegrate.

If someone of a different god steals the Amulet from you on the Astral Plane and sacrifices it to their god, your god will hit you with a wide-angle disintegration beam in frustration that you got so close and then blew it.

Disintegration rays have a small (on the order of 5% or 10%) chance of destroying the player’s reflection source instead of reflecting. This terminates the ray, so the player can’t get hit twice by it.

Erosionproof items should be immune to disintegration as well.

The scroll of destroy armor, when confused, cursed, and naked, grants temporary disintegration resistance.

Make instadeaths more consistent with respect to life saving: brainlessness destroys only the brain but cannot be life saved, whereas disintegration destroys your entire body but can be life saved. One or both of these should be changed.

Disintegration blasts don’t reflect from a wall; they dig it out instead. If the wall is undiggable, the ray merely stops - it never reflects.

Dragon eggs can be used as special types of thrown missiles. Black dragon eggs specifically have a disintegration effect.