Jocasta Nu, Chief Librarian

When Jocasta Nu, Chief Librarian enters the battlefield, if you cast her from your hand, draw five cards.

You have no maximum hand size and don’t lose the game for having 0 or less life.

Whenever you gain life, draw that many cards.

Whenever you lose life, discard that many cards. Then, if
you have no cards in hand, you lose the game.