mtg multicolor cards March of the Machine Rares can be from any set from Revised to current standard sets. Ikoria Standard Set Review: Multicolor

Mana filtering effects like : add a mana of any color arent ramp, so cards like Blood Celebrant dont make the cut

Take a deck like Legacy ANT, for example: As an all-spell storm combo deck, the only opportunity cost associated with playing Lurrus of the Dream Den in Ad Nauseam Tendrils is giving up a sideboard slotthe companion restriction is incidentally met

Maestros Confluence Maestros Confluence has three distinct options, one of which goads each creature a player controls

Rakdos can do +1/+1 counters, and if we add back Rakish Heir and pop in other ways to accrue counters, this becomes another reliable removal engine alongside of (or instead of) our deathtouch engine