Cloudsteel Kirin (Kamigawa: Neon Dynasty)

Artifact Creature Ñ Equipment Kirin - Flying
Equipped creature has flying and "You can't lose the game and your opponents can't win the game."
Reconfigure {5} ({5}: Attach to target creature you control; or unattach from a creature. Reconfigure only as a sorcery. While attached, this isn't a creature.)