Static Prison

Oblivion Ring taught a generation that white's premium removal comes with a leash: exile until this leaves, and the whole package is really two cards, where the enchantment is the second one an opponent can attack. This design keeps that structure intact. It still exiles until it leaves the battlefield, so cracking the enchantment still returns the target. What it adds on top of that vulnerability is a second one: a recurring energy tax, front-loaded with exactly enough fuel to survive the opening turns. Entering, it exiles a nonland permanent and hands you two energy; at the start of each of your first main phases, keeping the prison shut costs one. So it buys itself two guaranteed turns and then asks for a resource you were only generating if you built to. That is the tension. At one mana it answers anything nonland immediately, but it is temporary removal on two axes: an opponent can destroy the enchantment to spring the target early, or you can simply run out of energy and sacrifice it yourself. The genuinely clever part is that the two energy it produces is not just self-payment; it is a deposit into a shared pool, so a deck full of energy sources treats this less as removal-on-a-timer and more as an energy source that happens to shackle an opposing threat while it fills the reservoir. It rewards a build where energy is fungible currency, and it punishes the player who slots it in expecting fire-and-forget permanence.