Arwen, Weaver of Hope
Most counter-anthems hand out a fixed bonus: a flat +1/+1 baked in at printing, the same for every creature that follows. This one instead reads a live stat, its own toughness, and stamps that many permanent counters onto each creature that enters after it, which turns the body into a dial rather than a printed number. The starting toughness is only 1, so at face value each newcomer walks in a single counter larger, a modest opening payout for a three-drop. The architecture reveals itself the moment you push that toughness upward. Because the ability is a replacement effect (the counters exist as the creature enters, not as a continuous buff layered on afterward), the bonus survives its source leaving the battlefield, stacks with proliferate, and any effect that raises this creature's toughness widens the payout for everything that arrives next. That feedback loop is the point: grow the anthem by even a little and the following creatures enter correspondingly fatter, and since the reward lives in real +1/+1 counters, a board wipe that spares the recipients leaves their gains intact. It is a green counters engine wearing the frame of a fragile Elf, built for a shell that both floods the board and cares about counter quantity over raw stats. The 2/1 is the constraint that keeps it honest: the effect scales with a stat the card starts almost none of, so the reward tracks exactly how much work you put into growing it.
