Where is it?

Boss in Blackfathom Deeps. 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 3 opened loot windows.

Item	Chance	Source
Moss Cinch	67%always (2/3)67% chance (always) – common (2/3)
Splitting Hatchet	33%1 in 3 (1/3)33% chance (1 in 3) – common (1/3)