Eternal Sovereign, Elara

You can not win the game.
At the beginning of your upkeep, you gain 2 life,
make a treasure token and draw a card for each permanent type, from among other legendary permanents you control.
Whenever a player would lose the game, instead,
that player's life total becomes 5, they shuffle their graveyard and hand into their library and draw 7
cards. All nonland permanents they controlled are
exiled.