Passive ability. Causes Dark Seer's next attack on a hero to have True Strike, knock a replica out of the victim, damaging and stunning them based on how far Dark Seer has moved in the past 3.0 seconds. Max power is reached after 1100 distance moved.
Surged units leave behind a 150 radius trail that lasts 7s, slows enemies around it by -50% and deals 40 damage per second in 0.5s intervals. Can be put on alt-cast to disable the trail.