Drannith Ruins

The activated ability is where the design lives, and its shape is unusually pointed: two mana and a tap for two +1/+1 counters, but only on a non-Human creature that entered this turn. That "entered this turn" clause is the real constraint. It refuses the deck that dumps its board in one explosive turn and then wants a static anthem; instead it rewards a shell that deploys threats in sequence, one arrival per turn, so there is always a fresh target waiting. The non-Human restriction is the second gate, quietly steering the card toward Beasts, Elementals, tokens, or any tribe defined by what it is not. The cost is set high enough that this is a mana sink rather than an accelerant: it wants the early turns already resolved before it starts adding stats. Until then it taps for a single colorless mana, which keeps the land from being dead but does nothing to smooth colors; the mana ability is scaffolding, not fixing. This belongs to a small line of utility lands that tuck a slow, repeatable pump into the manabase, the kind that never costs a card in hand but demands a deckbuilding commitment before the game starts. Most counter-producing or creature-producing lands ask you to bend a curve or a color around them. This one asks only that your creatures share a single negative trait, and that you play them one at a time.