Rogue · Subtlety · tier 1 · from level 10
Opportunity
+49.7 Garrote
2/2 · level 60 · per cast · and 3 more
Opportunity
Rank 2/2
Increases the damage dealt by your Backstab, Garrote, Ambush, and Mutilate abilities by 10%.
Averages, counting crits and misses, for a level 60 Rogue with a typical weapon and no other gear or buffs, against a target your level. Worked out from the game's own data, the same way as the Foresight addon.