Flooded Shoreline

A repeatable bounce engine priced in a currency the deck pays gladly: the lands themselves. This is a repeatable Unsummon stapled to an enchantment, and what keeps a mana-only effect from running away is the land tax folded into the activation. You tap two Islands for the , then return two Islands to hand to finish the cost, and nothing stops you from returning the same two tapped Islands you just used for mana. Either way the arithmetic is unforgiving: each use puts two lands back in your hand while you can only replay one, so every activation nets you down a land, and the engine eats itself the longer you lean on it. What you buy with that drain is a permanent answer that never runs out of fuel as long as you keep drawing Islands, the kind of inevitability the mono-blue control decks of its era prized. Late in a flooded-out game, when surplus Islands are dead draws anyway, those extra lands convert into repeated tempo against the opponent's best creature: the cost that crippled you on turn four is nearly free on turn fourteen. It rewards exactly the deckbuilding posture it asks for, a heavy-Island base willing to trade development for grind, and it stands as an early, clean expression of the idea that an enchantment can be a creature-bounce engine you cast once and feed off your own lands forever, provided you keep refilling the tank faster than it drains.