| qutoes |
The Surprise Spells class feature allows the Arcane Trickster to add his sneak attack dice to spells that deal damage that target flat-footed foes. This damage is only applied once per spell. In the case of fireball this means it affects all targets in the area, with each getting a save to halve the damage (including the sneak attack damage). In the case of magic missile, the extra damage is only added once to one missile, chosen by the caster when the spell is cast.