Engrave your helm with the Pandemic rune: Periodic damage from your Corruption, Unstable Affliction, Curse of Agony, Immolate, Curse of Doom, and Siphon Life abilities can now be critical strikes.

Engrave your belt with the Invocation rune: Refreshing Corruption, Immolate, Curse of Agony, or Siphon Life when it has less than 6 seconds duration remaining will cause you to deal instant damage ...