Good-Fortune Unicorn
The distinction that matters is between a counter and an anthem, and it is the entire reason this creature exists. A traditional lord taxes you for keeping it alive: kill the enabler and every creature it was propping up shrinks back to base size. This trigger does not work that way. When another creature you control enters, the +1/+1 counter it earns is banked permanently, welded to that body whether or not the Unicorn survives to see it. Each token, each mana dork, each one-drop arrives one size larger and stays that way, which quietly changes the math of trading down: burn that would kill a fresh 1/1 comes up short, and chip damage no longer clears the board. The payoff scales with how fast you can flood, so anything that makes several creatures in a single moment multiplies the counter output. The green-white pairing puts it in the long go-wide tradition of turning quantity into quality, but the durability is what separates it: a conventional anthem asks you to protect one linchpin, while this asks you to keep the creatures coming. The 2/2 body is deliberately forgettable so the trigger carries the card. Note the sequencing constraint that keeps it honest: the counter lands only on creatures that enter after the Unicorn, only while it is on the battlefield to see them, and only on the entering body itself, never retroactively on the widened board already in play.
