Spell Flow

You hurl an orb of pure energy at a creature you can see within range of the spell. It must make a Dexterity saving throw. On a failure, the creature takes 3d6 force damage and becomes marked for 1 minute. When you hit a marked creature with a spell that deals damage, you detonate the mark and end its duration, dealing the same damage to that target again. When the mark detonates, other creatures within a 10-foot radius centered on the marked target must make a Dexterity saving throw. On a failure, they take the same damage.

At Higher Levels. When you cast this spell by spending Mana points equal to a 3rd-level spell or higher, the damage increases by 1d6 for each spell level above 2nd. When cast as a 5th-level spell or higher, this spell’s damage becomes runic.