Prismatic Circle

The Circle of Protection template had a problem: each one stopped exactly one color, so a player who wanted to cover the wheel had to draw and resolve a whole stack of them. This is the answer that folds the wheel into a single card. The choice is made as the enchantment enters, which is to say on resolution, not on the stack; an opponent deciding whether to counter it has to commit before knowing which color you will name. Where a standard Circle is simply dead against the wrong deck, this one lets you read the table and then lock in. The check on that breadth is the cumulative upkeep: an age counter every turn, an extra generic mana piled onto the cost to keep it alive. What looks like a permanent shield is a wasting asset, bleeding mana on a compounding clock until you either let it die or sink your whole turn into payments. That clock reframes how the card is used. A free-standing color hoser invites you to camp behind it for the rest of the game; tax it on an escalating timer and it becomes a tool you deploy against one aggressive plan, ride for a few turns, and discard once the threat is handled. It is white's hedge against catch-all prevention being too good: give the player one card that can answer any color, then make sure they cannot hide behind it forever.