Archon (5e Spell)
From D&D Wiki
|Casting time:||1 action|
|Components:||V, S, A (A charged lodestone)|
This spell allows you to shed your physical form and become an energy being. While transformed in this way, you gain immunity to non-magical bludgeoning, slashing, and piercing damage, as well as resistance to their magical counterparts. You gain a fly speed of 15 feet, to a maximum height of 15 feet above the ground, if you could not fly before. You may also hover a foot off the ground at a speed equal to your land speed. Finally, your AC can’t be less than 10 + your proficiency bonus + your Intelligence modifier, regardless of what it was before.
All spells you cast while in this form now deal force damage, and all cantrips are empowered to their next level "category," (i.e, if you are level 11-16, you cast Acid Splash as if you were level 17. If you are 17th level or higher, you can add one extra die of damage to it to continue its pattern.)
At Higher Levels. When you cast this spell using a spell slot of 8th or higher, your AC increases by 1, or 2 if you used a 9th level spell slot.