Tier 1 (Hero Level 1)
Dark Swarm grants 40 Spell Armor, reducing Ability damage taken by 40%.
Patch changes[]
(Patch December 14, 2016) Note: Dehaka takes 40% less damage from Abilities while Dark Swarm is active.
(Patch July 12, 2016) Note: Increased Spell Resistance from 25 to 50%.