Chain Lightning

From DotA Allstars Wiki

Overview

Chain Lightning is an active skill that when used, summons a bolt of lightning that bounces around enemies, dealing damage.

Notes on Chain Lightning

This was a skill of Ladder's Far Seer.
Chain Lightning jumps to the closest nearby enemy on each bounce. If there are no enemy units in a certain area, Chain Lightning stops jumping.
There is a 0.25 second delay between when the Chain Lightning hits the unit, and when the unit actually takes damage.
As long as a Chain Lightning from a skill or item is still bouncing, that skill or item cannot cast another Chain Lightning. This is most noticeable with Zeus' Arc Lightning.
Because there is no actual projectile to Chain Lightning, it cannot be dodged by Blink or Wind Walk once the animation plays.
In the case of Razor and Medusa's Chain Lightning, there is a 15% damage reduction for each consecutive bounce, so the first unit takes 100% damage, the second takes 85%, the third takes 72.2%, etc. Prophet's Wrath of Nature has a -7% damage reduction for each bounce, meaning the damage actually increases by 7% for each unit. All other forms of Chain Lightning have no damage reduction.
Some Ultimates use a version of Chain Lightning with no bounces but very high damage as a single target nuke that cannot be dodged, like Lina's and Lion's ultimates.

Units that possess this ability

Lightning Revenant's Chain Lightning
Gorgon's Chain Lightning
Lord of Olympia's Arc Lightning
Tormented Soul's Lightning Storm
Prophet's Wrath of Nature

Items that provide this ability

It is important to note that, the following two items do not provide active castable Chain Lightning, but give a chance to automatically trigger it as an Orb Effect.