Make him an unlockable character Boomerang and bomb skills, flute for buffs. You're already half way there !
are the shadows on the board fog of war? i mean do we have fog or the enemy characters just disappear behind a pillar?
Nope and nope The shadows are just decorative. At present you can see all characters on a board at all times. There are line of sight rules though for targeting etc.
Do spells with an area of effect require a target to be used or can you shoot into a blank space to hit someone behind cover ? And would an AoE wrap around a pillar or be blocked by it ?