Helcurt

Helcurt remains in Prowler state until spotted by the enemy team, gaining 15% extra Movement Speed, and continuously regenerating (+30% Total Physical Attack) HP if he has not dealt any damage.
He gains 50% extra Attack Speed and 50% extra Movement Speed (decreasing over time) for 4s upon being spotted and leaves Prowler state 0.75s later.
Any hero killed after being hit by Helcurt leaves a dark fog that explodes and spreads with a cooldown of 10s. Helcurt Conceals himself while within the dark fog.

Passive: When Helcurt is in the Prowler state, Terrify also affects enemy heroes hit and briefly reveals them. Its cooldown decreases 3 times as fast as normal.
Active: Helcurt blinks to the target location and deals 150 (+70% Total Physical Attack) Physical Damage to enemies in the area, reducing their Movement Speed by 60% for 0.75s.

Passive: Helcurt gains 1 Deadly Stinger for every 1.5s spent in Prowler state or on each Basic Attack. Up to 5 Deadly Stingers can be stored.

Active: Helcurt fires all Deadly Stingers forward, each dealing 180 (+50% Extra Physical Attack) Physical Damage to enemies (minions and creeps take only 70% of the damage).
Deadly Stinger counts as a Basic Attack but cannot Crit.

Helcurt summons the Dark Night, reducing all enemies' sight range and blocking ally vision sharing for 3s. During Dark Night, Helcurt gains 40% extra Movement Speed.

The Dark Night makes it easier for Helcurt to leave enemies' sight range.