Jo, Second Celestial Prisoner

Indestructible
Jo, the first celestial costs {2} less for each time it is placed into exile.
When Jo, the first celestial prisoner, enters , for each opponent exile up to one creature, land, and enchantment that player controls. Return the permanents under this players control as colorless, artifacts named "keys to the vault" with {t} : look at the top 2 cards of your library exile one and place the other back on top.
When Jo first celestial is removed from the board, return all exiled permanents ba