Where is it?

Boss in Shadowfang Keep. See the boss's loot on the instance page.

Drops

From EG Link (collected in Forever by other players, not confirmed with Forever Scout): share of 4 opened loot windows.

Item	Chance	Source
Head of Arugal	75%always (3/4)75% chance (always) – common (3/4)
Robes of Arugal	75%always (3/4)75% chance (always) – common (3/4)
Lesser Mana Potion	25%1 in 4 (1/4)25% chance (1 in 4) – common (1/4)