Easy way to stack the same DOT on an enemy and dish out terrible-terrible damage.
Normally, you cannot cast multiple copies of Damage-Over-Time spellss like Locust Swarm on mobs. However, this is not true if you apply the DOTs at different Intelligence values. If you play with Locust Swarm and Soul Harvest, begin by applying an an un-buffed version of Locust Swarm, then immediately Soul Harvest and apply it again. The two versions of the spell will stack on each mob.
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