Potion of Greater Mana

On use, roll 1d20
1: You become delirious, take 1d8 psychic damage
and become incapacitated for 1 round of combat.
Regain 1 expended spell slot (ESS) between
1st and 3rd level
2-10: Regain 1 ESS between 1st and 4rd level
11-16: Regain 1 ESS between 1st and 5th level
17-19: Regain 1 ESS between 1st and 6th level
20: Regain 1 ESS between 1st and 7th level
+ 1 up to 5th level