One with the Multiverse

The eight-mana enchantment that pays for itself. There is a long tradition of blue "free spell" engines that grant one cost-free cast: Aluren, Omniscience, the various riffs on casting from an empty hand. Where those either open the floodgates or ask nothing of your library, this one bolts a Future Sight-style top-of-library visibility onto that free cast, so the engine feeds itself. You see the top card at all times, you can play lands and cast spells from it, and once during each of your turns you take one spell off the top or out of your hand for nothing. The interlock is the point: the top-of-library access helps ensure there is often something waiting to be that free spell, and the free cast keeps the top uncapped so the pipeline never stalls. The eight-mana price tag is the honest tax. By the time this resolves you are past the point where a single free cast per turn wins on tempo alone; it is a value crescendo that assumes the game goes long, not a combo enabler that ends it on the spot. The clamp to your own turns is deliberate, and doubly so: it caps the free cast at one per turn cycle and denies you the instant-speed blowout of dumping a free counterspell or removal spell during an opponent's turn. Slow, expensive, and inevitable rather than explosive.