timestopper1231

in the time I’ve been away, You’ve probably figured out that Giygas’ attack was a non-elemental magical attack with a +2d30 damage bonus to telepathic monsters and humans, and that eating Giygas’ corpse conveys telepathy and a random intrinsic.
Eating Corpses always gives delayed instadeath if they are >100 turns old unless the monster is sessile (excluding the oracle, which also gives an alignment penalty of -3). Be careful to avoid YASD!