mtg card with most keywords One of the busted in Magic Absolute Rarest Keywords? : r/mtg

Mox Sapphire Unlimited Price: $16,800 Another of the coveted Mox stones, the Mox Sapphire has the advantage of producing blue mana, the color that gets the most synergy from artifacts

Again, that does not usually matter, because you cannot play off-colour cards, and most steal effects already let you spend mana as though it were any colour

Cast this in response, taking control of all the Rift owners' creatures, then those go back to hand while all of your creatures are safe (unless they have a sac outlet or something, that is less than ideal but still hoses their creatures)

There is no reason not to include it in Limited