Slumbering Waterways

A dual land that keywords itself. The green-or-blue mana it taps for is entirely ordinary; the flying, vigilance, and trample stapled underneath are the punchline, since a land has no power or toughness, never enters combat, and derives nothing from any of them. The card exists to exploit a specific rules corner: printed-matters syntax that reads a permanent's abilities without the permanent ever using them. That trick has narrower reach than it looks. Effects checking for a "creature with flying" (the Odric-style keyword-sharing engines) ignore a land entirely unless something animates it first, because the land is not a creature. What actually notices this land is anything counting keywords across permanents or cards regardless of type: an effect reading the battlefield for a spread of abilities finds three here that a normal dual would never supply. The design belongs to a lineage of gag lands that exist to strain what a permanent type is supposed to be allowed to hold, and the enters-tapped clause is the only concession to it functioning as a real fixer at all. Read straight, it produces two colors slowly. Read as intended, it is a land that lies about being able to block, and hopes to find the one card willing to take the lie at face value.