Zulrah of the Poison Waste

You can't lose the game for having poison counters.

At the beginning of your upkeep, if you have 20 or more poison counters you win the game.

Creatures your opponents control have Toxic 1.

Whenever a player casts a noncreature spell, they create a tapped Snakeling creature token.

{u}{b}{g},{t}: Each player creates a tapped Snakeling creature token.