Duergar Hedge-Mage
Land subtypes settle this dwarf's worth the moment it hits the battlefield: control two or more Mountains and it cracks an artifact on arrival; control two or more Plains and it cracks an enchantment; a manabase deep enough in both fires both triggers off a single 2/2 body. Crucially, the check counts subtypes, not the word "basic," so shocklands, duals, and any Mountain- or Plains-typed nonbasic qualify, which quietly rewards the fixing a two-color deck already wants to run. This sits in a small cycle of Hedge-Mages, each keyed to a pair of land types rather than a pair of named cards, and the structure is deliberately self-limiting: fall short of either threshold and the intervening "if" clauses never fire, leaving the body to do nothing but block. The removal is never guaranteed and never stranded. Each trigger evaluates its threshold on entry and asks for a target then, and the "may" lets you decline when the only legal target is one you would rather keep, or lapse entirely when nothing qualifies. The destruction happens once, on the way in, which is the whole bargain: an answer for two of the most stubborn permanent types in the game, costing nothing beyond a creature spell so long as your lands carry the right subtypes. The payoff scales with how committed the manabase is to the colors the dwarf already lives in.
