Make politics / force people to use Xantcha with discard, overall; defend yourself.
Main win con : Combo
Search for "Basalt monolith + Rings of Clairatre" For inf mana, use it for xantcha, find Walking balista for killing others, Ugin for saving your ass, elixir of immortality for infintelybrary or planetary orary for make color mana and play the entire deck, again.