Maximum interaction (which means cards that are hard to interact with are more likely to be cut, so no planeswalkers, limited shroud, only temporary spells/abilities give unblockable effect)
But is the joke still funny when the 'suits' start getting in on it
I love this at multiplayer when you have a few options, and with Mana Rocks and Lands that can make any color of mana, because getting any color of mana from your Dimir control brew that grabs a red activated ability is pretty valuable, so run this with City of Brass and Darksteel Ingot and Fellwar Stone
Overall) - Freya Crescent This one-mana on-curve uncommon has flying on your turn and then is a mana tapper for red that can only be used for casting or equipping that spell, so she's brilliant in that brew, ideally in the 99 or support outside of Commander, not leading it
Whether they were reprints or new cards was left up to the design team