Elemental Convergence

You unite the five elemental damage types into a devastating beam of destruction. All creatures in a 10-foot-wide, 90-foot-long line from you must make a Dexterity saving throw. Each creature takes 3d6 Acid, 3d6 Fire, 3d6 Cold, 3d6 Lightning and 3d6 Thunder damage on a failed save, or half as much damage on a successful one. At the end of the line, the energy explodes outwards in a 30-foot-radius sphere. Each creature in the radius must make a Dexterity saving throw and suffer the same effects as those in the line.