Wymar's Find Greatest Steed

During the 10 minutes it takes to cast this spell, the clockwork dragon toy radiates light from within, making it impossible to see. At the end of the spell, the usual effects of the Find Greater Steed spell occur, with the following alterations:

• The celestial spirit known as Dexter (who once served as a familiar and companion to Wymar Jr.) instantly merges with the toy, transforming into Dexter, the Clockwork Drake.
• If Dexter, the Clockwork Drake disappears, either due to being reduced to 0 hit points, or being dismissed as an action, the component of this spell magically appears in your pocket. The trinket is immune to all forms of damage, and can only be destroyed if you willingly strike it with a divine smite of your own free will.