Rime Tender

A mana dork that never taps for mana is a small joke at the archetype's expense. This one inverts the whole exchange: instead of adding to your pool, it re-primes something you have already spent, and by keying off the snow supertype it becomes a repeatable untapper aimed at exactly the permanents that most want to fire twice a turn. A snow mana rock gets doubled. A snow land with a tap ability goes again. Another creature with a costly tap effect resets without waiting for your untap step. The 2/2 body matters less than the fact that the Druid is itself a snow permanent, which means it can untap copies of itself: two of them will loop back and forth forever, but because the ability only ever hits a single target, that loop nets nothing on its own. It needs a third snow source with a useful tap ability, and a way to route the extra untaps there, before the engine produces anything you can spend. The snow clause is what holds it back from being a generic untap outlet: it only functions inside a manabase and a shell committed to the supertype, so the card demands that investment before it does a thing. That makes it less a value creature than a combo enabler wearing a green two-drop's clothes, inert in most decks and the linchpin of the one built to abuse it.