Tasha's Temporary Chair (version 3.1)

You create a simple chair (wood, with one cushion) that has AC 15, immunity to poison, psychic, and radiant damage, vulnerability to fire, and 27 hit points. After you lose concentration, or willingly let go of it, the chair vanishes, causing anything on it that is not the cushion to fall and take 0 bludgeoning damage, but make a CON saving throw to maintain concentration (if concentrating on a spell).