Rustic Clachan

The cleverness lives in the card type. Reinforce hangs a discard-for-value ability onto a land, the card you are least precious about pitching once your manabase is full. Early, this is a white source that walks the usual tribal-tax line: untapped if you can reveal a Kithkin, tapped if you can't. The reveal clause rewards a deck deep in the type without punishing a lighter build, since the worst case is a single slow turn. The reinforce mode is the second life. A land flooding the top of your deck is dead cardboard, but spend to discard it and it becomes a +1/+1 counter at instant speed: a way to push an attacker through, to save a creature from a one-toughness sweep, or to convert surplus mana into board presence. The two roles are mutually exclusive, and that exclusivity is the real decision the card forces. Reinforce discards the card from hand, so a copy you reinforce never reaches the battlefield as a land; you either play it for the mana or you spend it as a trick, never both. Reading your hand correctly means knowing which game you are in before you commit the copy. What the design quietly solves is the dead-draw problem that haunts fixing lands in the late game: a flooded-out copy still has a job, because the keyword converts the surplus land into a combat resource without asking you to have packed a separate trick.