Ixalan's Binding

Oblivion Ring established the template: an enchantment that pockets a permanent and gives it back when the enchantment dies. The wrinkle this design adds is the second line, and it is the part that changes how the card plays. Exiling a permanent is reactive; barring opponents from casting anything sharing the exiled card's name is preventive, and it does more work than it looks against decks built on redundancy. Hit one copy of a four-of and the other three become dead cards in hand, uncastable until the binding leaves the battlefield. Against a singleton bomb the name clause is a dead rider, but against the format's most repetitive threats it doubles as a soft lock. The targeting is also unusually permissive for white removal: any nonland permanent an opponent controls, so it answers planeswalkers, artifacts, enchantments, and creatures from the same slot, without the creature-only blind spot that limits cards like Pacifism. It also arrives on the modern single-duration template, "until this enchantment leaves the battlefield," which folds the exile and the return into one continuous effect rather than the two separate triggers older O-Ring variants used; there is no stack trick here for permanently stranding the exiled permanent. What every O-Ring variant surrenders in exchange is durability: it is an enchantment, so disenchant effects hand the exiled permanent (and the name lock) straight back. What you are buying is a clean catch-all that punishes the opponent for playing four of anything.