Special Moves and Abilities
Mystic Arc is a Special Move.
- “The thrown projectile will arc to a second target after hitting the primary target. Chaos energy will burst from the projectile at each target. This will only hit targets that are in combat with the user.” 
Mobiles Using Mystic Arc
Mobiles which can train in Mystic Arc
This only lists mobiles which can train in Mystic Arc 'out of the box'. Some additional mobiles may also be able to train Mystic Arc if their initial set of abilities and moves is modified.