Part of the Implements of Unspoken Names set:

The set gives these bonuses as more pieces are worn: 3: 5% increased damage from your summoned pets' melee attacks and damage spells. Set Details | All Sets

Quest Reward from:

Level	Name	Start	Rewards
60	Ring of Unspoken Names  (Raid) Horde and Alliance Ahn'Qiraj	Windcaller Yessendra Silithus	6600 XP