Tireless Tracker

The genius here is that two mediocre mechanics (a body that dies to anything, a Clue token that costs more mana than the card it draws) feed a third that makes both retroactively worthwhile. Every land drop banks a Clue; every Clue you eventually crack draws a card and grows the body, so flooding out becomes a resource instead of a death sentence. That is the structural problem this card solves: midrange green decks have always wanted something to spend their late-game lands on, and the usual answers were dedicated mana sinks that did nothing early. This one starts paying the moment it lands and scales with a stat green already overproduces. The deferred payoff is what keeps the rate fair: the cards and the counters wait on the mana to sacrifice, so an unattended Tracker is a pile of stored value idling until you can spare the tempo. It rewards the most boring play pattern in the game (hitting your land drops) and converts it into a grindy advantage engine that asks nothing of your deckbuilding beyond running lands. The +1/+1 counters are almost an afterthought, but they answer the body's real weakness: left alone for a few turns, a 3/2 that dies to everything quietly becomes a threat that trades up and ends games. A clean piece of incidental card advantage stapled to a creature that fights back.