Detention Sphere

Oblivion Ring drew the template: an enchantment that exiles a permanent until it leaves, answering anything from a planeswalker to a creature to another enchantment with one flexible card. What this design adds is the clause that catches multiples. Where the older card hits a single target, this one sweeps every permanent sharing that name, which means a board flooded with tokens from one source, or a fistful of redundant copies of the same threat, collapses to a single answer. That reframes the card from spot removal into a soft sweeper against decks that win by going wide off one engine. The cost is the same structural fragility every exile-until-it-leaves enchantment carries: kill or bounce it and the exiled permanents come back, so it parks a removal effect on the battlefield where the opponent gets a window to undo it rather than tucking the threat away for good. The "not named Detention Sphere" wording is the housekeeping that keeps it from targeting itself or chaining into a self-exiling loop. As a piece of color-pair identity, it gives Azorius a versatile catch-all that respects white's tradition of conditional exile while leaning on blue's comfort with answers that sit on the stack and the board, waiting to be triggered or disrupted.