Impending DoomSpell, AoE, Trigger, Chaos Cost & Reservation Multiplier: 130%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 expirePlace 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 GroundCursed GroundSupport, Curse Category: Cursed Ground Tier: 3Support Requirements: +5 IntSupports Curse Skills. Supported Curse Skills create 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 2 areas 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 Support Gems of the same Category socketed within one Skill. and either Spell EchoSpell EchoSupport, Spell, AoE Category: Spell Echo Tier: 2 Cost & Reservation Multiplier: 150%Support Requirements: +5 IntSupports 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 Remote skills or skills which are Triggered.Supported Spells Echo once Supported Skills have 30% less Cast Speed Echoes from Supported Spells have 40% increased 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 Support Gems of the same Category socketed within one Skill. or UnleashUnleashSupport, Spell Category: Unleash Tier: 1 Cost & Reservation Multiplier: 150%Support Requirements: +5 IntSupports Spells you cast yourself, making their effect reoccur when cast. Cannot support Channelling Skills or 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 Support Gems of the same Category socketed within one Skill., 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 GroundCursed GroundSupport, Curse
and either 
Spell EchoSpell EchoSupport, Spell, AoE
or 
UnleashUnleashSupport, Spell
, due to the limit of 1 Cursed Ground, the Cursed Ground will expire immediately, proccing Doom Blast.
