Seed of Corruption

Seed of Corruption, often abbreviated SoC, is a level 38 Affliction warlock Shadow-based spell that deals area of effect direct damage after the target receives a specific amount of damage.

Tips and tactics
In instances, Seed of Corruption is most effective on large groups of mobs with relatively high health. Detonation will occur more quickly on a mob with full DoTs. If they won't live long enough for a few SoC to detonate, multi-dotting is a better choice.

While soloing, it is difficult to use SoC because of the amount of time required to set up a large cascade, especially when taking spell pushback. If the group of mobs is large enough to warrant the use of SoC, it is probably too large for a single warlock to handle.