Health + Energy Regeneration + Life Drain = Volatile Eruption
Automatic attacks place a debuff on your target which deals (Energy Regeneration Value * 25) damage over 5 seconds. Enemies which die with that debuff explode for (Health Value / 2) damage and also apply the debuff to nearby enemies. All damage through this feat is drained with (10 + Life Drain Value)% drain.
Health increases the explsoion damage. Energy Regeneration increases the damage over time. Life Drain increases the drain.