Boon of Supreme Magic

Epic Boon Feat (Prerequisite: Level 19+, Ability to Cast 9th Level Spells)

You gain the following benefits.

Ability Score Increase. Intelligence, Wisdom, or Charisma score by 1, to a maximum of 30.

Almighty Spell. You gain the ability to use magic beyond the normal constrains of the weave. Create a 10th level spell with your DM. The DM has great latitude in ruling what the spell does. Once cast, it cannot be cast until you finish 2d4 Long Rests.