mtg black ritual cards Dark Great Yawgmoth Darkness of Eternity (Dark Ritual)

If an effect allows you to cast a spell with tiered "without paying its mana cost," you must still choose exactly one mode and pay the associated additional cost

And not just any deck, but a deck that wins

Even without threshold I'd be very excited about a three mana 3/2 that loots twice when it enters, and that threshold trigger is a game-ender

(2019-11-12) Normally there is only one winning deck for each Mythic Championship

A shapeshifting creature joins your battlefield with this custom Mimic Copy Token

You already did the hard work of building a deck capable of producing the rainbow, so why not double up on your spells with the cascade granted by Maelstrom NexusMaelstrom Nexus