Eternabeam

You unleash an overwhelmingly powerful beam of pure energy. Target a point within range. Each creature in a 20-foot-radius sphere centered on that point makes a DEX saving throw against your Move DC, taking 8d6 + MOVE dragon damage on fail, half on success. You become incapacitated until the end of your next turn.

At Higher Levels: The damage dice roll for this move changes to 10d6 at level 5, 12d6 at level 10, and 14d6 at level 17.