Chain (Projectiles)

Chain makes a shot bounce from the enemy it hit to the nearest enemy it has not hit yet. Each point of Chain is one more bounce.

Where it comes from

Source	Weapon	Chain
Chain	Wand	+1 per level, up to 2
Some unique jewels	Bow or wand	Read the jewel once identified

Each bounce deals 60% of the hit before it, so the second bounce deals 36% of the first hit.
A shot looks for the next enemy within 10 blocks. Far Reach adds 15% increased chaining range per level on a wand.
It never bounces to an enemy the shot already hit. With no other enemy in range, the shot just ends.
Wand chains need line of sight. Phantom Beam at its top level lets them pass through walls.
Chain is used last. A shot only chains once it has no Pierce left and did not Fork on that hit.

When a shot hits an enemy it checks Pierce first, then Fork, then Chain. See Pierce for the full order.