Metamorphosis

6th-level Transmutation
Casting Time: 1 bonus action
Range: Self
Components: VSM($) (an object engraved with a symbol of the Outer Planes, worth at least 500 gp)
Duration: (C) 1 minute

As in Tasha's Cauldron of Everything in the spell otherworldly guide, except forms have been changed to the following options:

Chaos. You grow fiendish horns and leathery wings, taking on a demonic guise. You are immune to fire and poison damage, and to the poisoned condition.
Death. Your flesh become pallid or even incorporeal, granting you the strength of the grave. You are immune to cold and necrotic damage, and to the paralyzed condition.
Life. Your body becomes infused with the radiant energies of life, and you sprout vine-like or butterfly wings. You are immune to necrotic and radiant damage, and immune to the unconscious condition.
Light. Your body takes on an angelic appearance as you sprout pristine feathery wings. You are immune to holy and shadow damage, and are immune to the charmed condition.
Order. Your body is infused with arcane energies as you align yourself to the axiomatic. You are immune to arcane damage and to nonmagical bludgeoning, piercing, and slashing damage, and to the stunned condition.
Shadow. Your body is infused with the mind-bending power of the Void. You are immune to psychic and shadow damage, and to the frightened condition.

At Higher Levels. When you cast this spell using a spell slot of 7th level, the duration is concentration, up to 10 minutes. When you cast this spell using a spell slot of 9th level, the duration is concentration, up to 1 hour.

Source: TCE 116