Cibo, Carrier of the Sphere

Ward—{3}, Discard a card.

Start your ascent. (If you have not yet ascended, start at 1. Your ascent increases once on each of your turns when an opponent loses life. Max ascent is 4.)

Whenever another nonland permanent enters under your control, each opponent loses 1 life and you gain 1 life.

At the beginning of your upkeep, if you have Max ascent, you win the game.