Palace Floor Reflections

Cursebond (This creature has "enchant player" and enters the battlefield under the control of that player. It can't be sacrificed. It counts as a curse.)
At the beginning of each upkeep, the active player chooses a player. Then, each other permanent you control becomes a copy of a unique permanent they control and you become a copy of that player. (Your life and counter totals become equal to theirs. Your name is co