Demon Form

Demon FormShapeshift, Buff, Persistent
Level: (1-20)
Cost: (7-98) Mana
Cooldown Time: 15.00 secShapeshift into a demon, vastly boosting the power of your Spells. You gain Demonflame every second you remain in demon form, causing your Life to be lost at an ever-increasing rate. Maximum 10 Demonflame. Revert to human form if you reach 1 Life, use a Skill that isn't a Spell, or reactivate this Skill.(12-25)% increased Cast Speed while in Demon Form
+(3-6) to Level of all Spell Skills while in Demon Form
(0.8–18.5) Life Loss per second per Demonflame
Deal (7-18)% increased Spell damage per DemonflameSkills can be managed in the Skills panel.

Acquisition
Drop disabled
Granted by the Infernalist ascendancy notable Demonic PossessionMetadata
Item class: Skill Gem
Metadata ID: Metadata/Items/Gem/SkillGemAscendancyDemonForm

Demon Form is a shapeshifting skill granted by the Infernalist ascendancy notable Demonic Possession that allows the player to Shapeshift into a Demon. While transformed, you gain a large bonus to spellcasting, but lose life over time. While transformed, you gain stacks of Demonflame over time, which increases spell damage and life loss over time.

Skill functions and interactions

Shapeshifting skills disable both your weapon slots while transformed. It also grant a third weapon set passive skill tree option.

Demonflame is considered life loss, not damage. As a result, it cannot be redirected to other resources such as Mind Over Matter or mitigated through damage reduction. Demonflame will interrupt energy shield recharge (or life recharge with Eternal Youth).

Demon Form will automatically deactivate when the demoness:

• is at 1 Life, making it incompatible with Chaos Inoculation.
• dies, regardless of the amount of current life (in Trial of the Sekhemas, for example).
• starts reviving a downed teammate.
• uses any skill that is not a Spell or Warcry.

Other mechanics:

• Replaces the Dodge roll with a faster one, but does not add any new features.
• Prevents trigger effect of boots that create a ground: Birth of FuryBirth of Fury
  Stone GreavesArmour: 102Requires Level 33, 57 Str20% increased Movement Speed
  +(40-60) to maximum Life
  +(20-30)% to Fire Resistance
  Drop Ignited Ground while moving, which lasts 8 seconds and Ignites as though dealing Fire Damage equal to 10% of your maximum LifeAs the sun rises and the light approaches,
  so too shall your enemies fear you., Wake of DestructionWake of Destruction
  Secured LeggingsArmour: 33
  Energy Shield: 14Requires Level 16, 17 Str, 17 Int10% increased Movement Speed
  (30-60)% increased Armour and Energy Shield
  Adds 1 to (30-50) Lightning damage to Attacks
  Drop Shocked Ground while moving, lasting 8 secondsTempest's power given form,
  Flee before the walking storm..
• You cannot order minions using Command skills they give (this is likely a bug). However, you can order them to move or attack through Direct Minions.

Gem level progression

Level		Mana Cost
1	0	6
2	3	7
3	6	8
4	10	10
5	14	11
6	18	13
7	22	15
8	26	17
9	31	20
10	36	22
11	41	25
12	46	28
13	52	31
14	58	35
15	64	39
16	66	43
17	72	48
18	78	53
19	84	59
20	90	65

Recommended support gems

The following support gems are recommendations by GGG as listed in-game, and do not necessarily reflect optimal combinations or the views of the wiki.

Gem tier	Support gems
I		Coming Soon
II	Coming Soon		Cooldown Recovery ICooldown Recovery ISupport Category: Cooldown Recovery Tier: 3 Cost & Reservation Multiplier: 130%Support Requirements: +5 DexSupports skills with Cooldowns, increasing the rate at which those Cooldowns Recover. Cannot modify the skills of minions.Supported Skills have 25% increased cooldown recovery ratePlace 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.
III		Coming Soon	Coming Soon
IV
V

Version history

Version	Changes
0.2.0	The Demon Form Skill granted by the Demonic Possession Ascendancy Passive Skill now has a Cooldown of 15 seconds (previously 20), and a maximum Demonflame of 10 (previously uncapped). You now lose a flat amount of Life per second per Demonflame (scaling with Skill level), rather than a percentage of your Maximum Life. The dodge roll while in Demon Form has also had its distance reduced. Using Blink while in Demon Form now plays an appropriate animation instead of landing to Blink.
0.1.1	Fixed a bug where the unique item "Corpsewade" did not work when the player was using the King of the Faridun Body Armour Microtransaction. This also appears to have fixed a similar bug with Demon Form not triggering Decompose. [Undocumented]
0.1.0f	Fixed a client crash that could occur after entering Demon Form while fighting Zarokh, the Temporal.
0.1.0e	Fixed a bug where interactables would remove the player from Demon Form. (Hotfix 2) Fixed a bug introduced in patch 0.1.0e where the Spell Gem Level from the Demon Form buff did not apply unless you resocketed affected gems. (Hotfix 7) Fixed a bug that could cause some characters to be disconnected, most notably when trying to use the Demon Form skill granted by the Demonic Possession Infernalist Ascendancy Passive Skill.
0.1.0c	(Hotfix 2) Demon form now has a minimum of 1 life lost per second, per stack.
0.1.0	Introduced to the game.