Prismatic Shard

After being infused with a Prismatic Key, a shard of Prismus grows on the creatures body. This gives them access to Prismatic Surges. Surges only have one use per long rest at 1st level, gaining an additional use at 5th, 10th, 15th, and 20th levels. There are three surges that can be used-

1. Elemental Surge. Upon activating elemental surge, all weapon damage you deal this turn becomes your choice of Fire, Cold, Acid, Lightning, or Thunder damage. All weapon attacks made this way also deal additional damage equal to your character level. This surge must be used before making an attack roll. At Higher Levels. At 8th level your elemental reach expands giving you access to Radiant, Necrotic, and Force damage types.
2. Spell Surge. When you activate spell surge, the next spell you cast is upcast by 1 level. This allows 9th level spells to be cast at a 10th level.
3. Life Surge. You can only activate life surge when your hit points reach 0. If you activate life surge you instead drop to 1 hit point and retain concentration if you held it.