Warlock · Affliction · tier 2 · from level 15
Soul Harvest
Soul Harvest
Rank 2/2
Killing a non-trivial target afflicted by your Drain Soul increases your Mana regeneration by 100% for 10 sec and allows 100% of normal Mana regeneration to continue while casting.
Doesn't change the damage or healing of any Warlock spell.
Averages, counting crits and misses, for a level 60 Warlock 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.