ilv 572 version:
Evil Eye of Galakras
Item Level 572
Binds when picked up
Equip: Increases the cooldown recovery rate of six of your major abilities by 46%. Effective for Strength-based damage roles only.
Equip: Your attacks have a chance to grant you 14037 Strength for 10 sec. [15% chance, ($proccooldown) sec cooldown] (ICD: 45 sec)
To dps warrior, it modifies recklessness, and 4th/6th talent (aoe and cooldown).
Basically, the highest ilv ones has a 46% cooldown decrease, and the math works as 1/1.46, which makes 30s CD to 20.5s.
Think about storm bolt, which is buffed by allowing fury warrior to attack with OH weapon too in 5.4. This trink allows storm bolt pairing with CS almost perfectly, resulting a huge dps boost.
btw it's dropped by the 5th boss out of the 14 bosses in 5.4 raid (and its a fixed boss drop), so I don't imagine the heroic version too hard to get.