WitcherDB
Witcher 3 console commands & item ID database

Rotfiend

Necrophages320 attack damage
Scavengers that feed on the dead — drowners, ghouls and hags. Vulnerable to Necrophage oil; Northern Wind and Igni clear packs fast.

Weakness

As a necrophage, Rotfiend takes extra sword damage when your blade is coated with Necrophage oil.

Loot drops

ItemQtyChance
Necrophage skin130%
Monstrous brain16%
Monstrous bone16%
Monstrous heart16%
Monstrous liver16%
Monstrous saliva16%
Monstrous tongue15%
Monstrous tooth1–35%

Drop chances are per kill; quantities show the range a single kill can yield.