Seen here: https://youtu.be/syWoe76LkWA?si=Gn6FcHsiMMGrGsCb&t=512.

Considering there is an item->owner tracking system used for items falling out of the Aether, maybe I can also use that to mark items as lightning-immune in the specific situation of the Silver Dungeon boss fight, since it seems like trying to prevent the lightning from spawning after player death hasn't been working as a full solution.