Belonged to an Elf in the King's Guard, who died in a fight against an ice wyrm.
“Sometimes we must be the shield so that others can be the sword,” she says with a wry smile. She points toward the bog. “My arm is somewhere in the muck. There’s a ring on it that’s been in my family, but it’s yours if you’ll help them like you helped me.” Backstory Codex - Oracle (RPA-BC)