Seal of Autmonon (Fire)

While holding this artifact, you can speak its
command word, ("Disguise"), as a bonus action
to cause it to transform into an charred bone staff
adorned with a dragon head. Speaking the
command word again will cause it to transform
back into a piece of the Seal of Autmonon.
Effect: Take 1d6 Fire damage to cast Fire
spells 1 level higher