Impending DoomSpell, AoE, Trigger, Chaos Tier: 1 Level: 1 Cost & Reservation Multiplier: 130% Cooldown Time: 0.15 sec Can Store 3 Use(s) Cast Time: 1.00 sec Critical Strike Chance: 5.00%Supports Curse skills you cast yourself, causing them to trigger Doom Blast on Cursed enemies when the Curse expires.Trigger Doom Blast when Curses from Supported Skills expire
Doom Blast Deals base Chaos Damage equal to 15% of your Current ManaPlace into a Skill's Support Gem socket in the Skills Panel to apply its effects to that Skill. You cannot have multiple copies of the same Support Gem socketed at the same time.
By combining a curse with Cursed Ground and either Spell Echo or Unleash, due to the limit of 1 Cursed Ground, the Cursed Ground will expire immediately, proccing Doom Blast.
Item acquisition
Impending Doom has restrictions on where or how it can drop.
Cursed GroundTier: 3 Level: 1Supports Curse Skills. Supported Curse Skills no longer have an activation delay, instead creating areas which Curse Enemies so long as they are within them.Supported Skills create Cursed Ground Enemies on the Cursed Ground from a Supported Skill are Cursed while within it Maximum 1 area of Cursed GroundPlace into a Skill's Support Gem socket in the Skills Panel to apply its effects to that Skill. You cannot have multiple copies of the same Support Gem socketed at the same time.Spell EchoSpell, AoE Tier: 2 Level: 1 Cost & Reservation Multiplier: 150%Supports Spells that affect an area around you or a target location. Supported Spells echo, causing their effects to happen again after a short delay. Cannot support Channelling skills or Remote skills.Supported Spells Echo once Supported Skills have 30% less Cast Speed Echoes from Supported Spells have 30% more Area of EffectPlace into a Skill's Support Gem socket in the Skills Panel to apply its effects to that Skill. You cannot have multiple copies of the same Support Gem socketed at the same time.UnleashSpell Tier: 1 Level: 1 Cost & Reservation Multiplier: 150%Supports Spells you cast yourself, making their effect reoccur when cast. Cannot support Channelling Skills of Skills with a Cooldown.Supported Spells gain a Seal every 200% of cast time, to a maximum of 2 Seals Supported Spells are Unsealed when cast, and their effects Reoccur for each Seal lost Supported Skills deal 50% less Damage when ReoccurringPlace into a Skill's Support Gem socket in the Skills Panel to apply its effects to that Skill. You cannot have multiple copies of the same Support Gem socketed at the same time.
Cursed Ground and either 
Spell Echo or 
Unleash, due to the limit of 1 Cursed Ground, the Cursed Ground will expire immediately, proccing Doom Blast.
