Blackened knuckle
From the hand that did the casting, burnt down to the part that would not burn.
Vendor trash. Nothing in the game wants it: no recipe, no enchant, nothing to wear. Stacks in one inventory slot. Vendors pay 100 coins for it.
What drops it
Emberbound magus
1 in 5
Rolled on its own rather than from the loot table, so it takes nothing away from anything else that falls off it.
What it trades for
No trades in the last 30 days.