all ultimatum cards mtg Ruinous | Ikoria: Lair of Behemoths | Modern then gain 5 life. Which is the best ultimatum?

Uro, Titan of Nature's Wrath | Illustration by Vincent Proce Simic creatures in MTG have a green-blue, or Simic color identity

This ability also works well with other cards incentivizing opponents to attack, such as Propaganda or Ghostly Prison

Doubling Season and Vorinclex make your deck even more nutty, and there are a whole suite of powerful counterspells and redicting effects (Mana Drain is particularly good, here) that will ensure your game plan goes off without a hitch

But when you need a board wipe, you can use the Exude Toxin omen, dropping a powerful -X/-X effect that wipes out smaller non-dragon creatures

Spiders gum up the board and protect your life total reasonably well, which lets you spend life more liberally to maximize Connections