1. Added new active skill: **Arc**
2. Added new ancient gem: **Dancing Sparks**
### Skill Description:
A bolt of lightning arcs from the caster to a target in front, then chains to other nearby enemies but does not immediately chain back to the original target. Each time the primary arc chains, it also releases a secondary arc toward another enemy that the primary arc has not yet hit. Secondary arcs cannot chain further. Maximum of 16 chains.
### Gem Exclusive Bonuses:
- **Arc** gains +1 additional chain.
- **Arc** releases 2 secondary arcs with each chain.