Mistcaller Yngvar by Nortin

Passive:
Yngvar's abilities apply Mistcaller's Presence to enemy heroes in their area of effect. Each ability can apply 1 stack, stacks don't decay while enemies remain in their area of effect, and Mistcaller's Presence lasts for 3 seconds after affected enemies leave their area of effect. Each stack reduces the vision range of affected enemies by 1.1 and reduces their movement speed by 10%.

Additionally, Yngvar hides in the mists, causing him to not appear on the enemy team's minimap.

The limit for Mistcaller's Presence is one stack per ability, not cast. For example, if an enemy is affected by a stack from Envelop and manages to keep that stack until Envelop is recast, the next cast of Envelop can't apply another stack.

Cooldown: 7 seconds
Cost: 45 Mana

Yngvar envelops a target allied hero in mists, healing them for 380 (+4% per level) Health over 5 seconds. Additionally, a cloud of mists cling to the affected ally, applying Mistcaller's Presence to all enemy heroes in a medium radius around them.

The radius of Envelop's mist is equal to the affected hero's collision hitbox radius, starting where their hitbox ends.

Cooldown: 9 seconds
Cost: 65 Mana

Yngvar calls mists to a target area, spreading out from the center over 2.5 seconds. Once the mist cloud reaches full area, it remains for 4.5 seconds. Shroud of Helheim heals allies within for 25 (+4% per level) Health every 0.5 seconds and damages enemies within for 25 (+4% per level) every 0.5 seconds. Additionally, Mistcaller's Presence is applied to all enemies in the mist.

Shroud of Helheim's area of effect grows similar to Malfurion's Entangling Roots and it's total area is similar to Azmodan's Globe of Annihilation.

Cooldown: 11 seconds
Cost: 50 Mana

Yngvar throws a trident in a target direction, dealing 259 (+4% per level) damage to all enemies it passes through and stopping at the first enemy hero hit. The trident leaves a trail of mist in its path for 5 seconds that applies Mistcaller's Presence to all enemies within.

If Kvaldir Trident hits an enemy hero affected by Mistcaller's Presence, it "bounces" toward the nearest enemy hero. Can only "bounce" once per hero.

Cooldown: 75 seconds
Cost: 100 Mana

Yngvar shrouds the map in dense mists for 6 seconds, applying Mistcaller's Presence to all enemy heroes. Additionally, during Helya's Grasp, allied vision for the enemy team is disabled.

Cooldown: 60 seconds
Cost: 80 Mana

Yngvar calls mists around an allied hero over 2 seconds, after which they gain Invisibility for 15 seconds. This effect is broken early if the affected hero takes or deals damage.