Tor Sverre Lund
When attacks hit multiple targets, do you roll only once and use that number for each target, or roll separately for each target?
Each attack is rolled separately. So for example if Immeril uses his Fireball on a tile with 2 Monsters, you roll the die for each of the 2 Monsters. So it's possible to hit both, none or just one of the Monsters. (rules, page 9, "Making an Attack")