Unnara's overpowered arcana

You pool your mana allowing you to cast more powerful spells.

By using your action, and a level X slot this turn, you can cast a level X+1 spell any time during the duration without consuming a slot of that level. *

You can use additional actions to add a level to the spell, thereby making is X + 2. **

If you do not cast a spell in the next minute, you take  a d6 force damage for every level the spell was empowered to.

*For example: casting this at level 3, you can cast a level 4 spell next turn without using a level 4 spell slot

** For example:casting this at level 3, and using your action in the next turn to empower it,  you can cast a level 5 spell in the turn after without using a level 5 spell slot.