Otherworldly Guise

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 with the following added:

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

Changelog

Added upcasting option.