mtg black ritual cards Dark the Gathering (MTG) trading and collectible card game (TCG/CCG) Dark Ritual Price From Revised

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

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

Look closely and you can spot it

And not just any deck, but a deck that wins

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

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