Star of Invincibility

9th-level abjuration

Casting Time: 1 action

Range: Touch

Components: S

Duration: Concentration, up to 30 seconds

You or one willing creature you touch begins to brightly flash with all colors. Until the spell ends, you become immune to all forms of damage, gain an advantage on all Strength, Dexterity, and Constitution checks and saving throws, and your base walking speed is tripled.

Any hostile creature that touches you, is touched by you, moves into you, or ends their turn touching you has to make a Constitution saving throw. On a failure, they take 45d6 Radiant damage, or half as much on a success.