C'Thun by rgg138

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C'Thun

By: rgg138
Last Updated: Oct 27, 2026
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C'Thun

Old God of Madness


Near-Immobile Hero. He moves slower with his tentacles. Does NOT replace core

C'Thun should feel less like a traditional Hero and more like an Old God spreading its influence across the battlefield. He doesn't rely on damage, healing, or conventional attacks. Instead, he observes, corrupts, and controls his enemies until they become vulnerable to his team's assault.

C'Thun applies Insanity to enemy Heroes, progressively reducing their damage and healing. Abilities consume insanity to CC

C'Thun can teleport globally, but his abilities are not global. His range is like Ragnaros Molten Core. He must choose a region to influence and reposition when the battle moves elsewhere.


Pros
CC
Debuffing
Scouting
Area control

Cons
Direct damage
Pushing
Zero mobility
Reactive fighting


For further reference, Azmodan Globe has 30 range and Sgt Hammer has 13

Combat Trait

1
C'Thun
C'Thun is near-immobile hero. He moves at 30% of a normal Hero movement speed using his tentacle.
His abilities (Q W E) have a range of 20 units.
2
Insanity
C'Thun's abilities and Corruption Aura apply Insanity to enemy Heroes, stacking up to 3 times. Lasts 8s, refreshing on application. If not reapplied, all stack expire.
Each stack applies an additional debuff.

- 1: Damage dealt reduced by 4%
- 2: Healing received reduced by 4%
- 3: Movement speed reduced by 10%

At 3 stacks, abilities consumes all stacks. That target cannot have insanity consumed again for 1.5s


Corruption Aura
Passively applies 1 Insanity to visible enemies within 20 range every 8s.
Insanity is not applied immediately upon entering the aura. Each enemy has a timer
3
EYE OF C'THUN (D)
Cooldown: 10s after death

Summon an Eye of C'thun that can move around the map and pass through terrain. Tap D to control.
Can only move within 40 range.
It can collect xp globes.

HP: 750 (+4%)
Size: Same as skinny heroes

Primary Abilities

1
Eye Beam (Q)
Cooldown: 7s

C'Thun fires a beam in a straight line, passing through all enemy Heroes hit and applying 1 Insanity stack to each.
Deals 100 (+4%) damage

At 3 stacks, consume them to greatly reduce Vision Radious for 5s
2
Dark Glare (W)
Cooldown: 12s

After 0.5s, C'thun's gaze strikes the targeted location, applying 1 Insanity stack to enemy Heroes hit.
Deals 50 (+4%) dmg

At 3 stacks, consume them to apply its debuffs 5x stronger for 4s
(16% dmg reduction, 16% less healing, 40% slow)
3
Tentacle Grasp (E)
Cooldown: 15s

After 0.5s, a tentacle erupts from the ground at a targeted area, rooting the closest enemy to the center for 0.5s, applying 1 insanity stack.
The tentacle prioritizes Heroes, and among them, prioritizes those with 3 Insanity stacks.

Consume 3 insanity stacks to instead fear the target for 2s.

Heroic Abilities

1
Call of C'Thun (R1)
Cooldown: 120s

After 1.5s warning, C'thun manifests at the target location.

Nearby enemies are hypnotized and slowed by 20%, walking towards C'thun for 1s. Afterward, affected Heroes deal 20% reduced damage for 8s.

Damage breaks hypinosis
2
THE EYE IS UPON YOU (R2)
Cooldown: 30s

C'Thun opens his eye, revealing all enemy Heroes within a 40 range radius for 9 seconds

While this effect is active, C'Thun's Proximity Aura extends to 40 range. Enemies within 20–40 range are affected by Corruption Aura, gaining 1 stack of Insanity every 10 seconds.

Special Mount

1
Unseal (Z)
Cooldown: 240s

After 2s, teleport to a place where you have vision. Taking damage stops the channeling.

Consuming Insanity reduces its CD by 6s.
Cooldown resets when dies.

Stats

lvl 0 base


Health: 5016 (+4%)
HP regen: 10.45 (+4%)

Mana: -
Mana regen:

Attack Damage: -
Attack Speed: -

Some Talent ideias

Anti-Mobility:
Enemies with 2 stacks who quickly moves (uses dash, teleport...) are slowed by 90% for 0.5s and takes small damage. 25s CD per Hero
Enemies with 1 stack who quickly moves (uses dash, teleport...) gain +2 stack of Insanity. 10s CD per Hero

Utility:
Eye of C'thun (D) vision increase
Eye of C'thun (D) movement speed increased
Eye of C'thun (D) reveals enemies they see for 2s
Insanity applied by Dark Glare (W) last 5s longer.
Insanity reduces enemy damage by an additional 1.5% per stack

CC:
Increase slow from 3 stacks to 25%
Tentacle Grasp (E) eruption delay decreased to 0.375s
Dark Glare CD reduced by 1s per enemy insanity consumed
Eye Beam (Q) width increased

Damage talents
Dark Glare deals 10% hp as damage over 3s
Tentacle Grasp now summons a tentacle at the location, dealing damage.
Eye Beam (Q) deals more damage
Applying insanity to enemies with 3 stacks also deals damage
Applying the third stack reduces armor by 15 for 3s. 15s cd per target

Healing talents:
Dark Glare heals allies for burst heal
Insanity can be applies to allies, healing them for small amount (no stack)

Storm Talents:
When C'Thun consumes three Insanity stacks, the target's Insanity cannot be reapplied for 2 seconds. In exchange, consuming then reduces the cooldown of the ability used by 4s
Unseal's (Z) CD is reduced by 30 seconds. After teleporting, C'Thun's proximity aura applies Insanity 50% faster for 8 seconds

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