Pet Avengers

The six-type creature line (Dragon Cat Dog Bird Frog Hero) is the visual gag, but Power-up is the text doing the real work: a one-shot activated ability paid in a single lump sum, riding a green body that turns a pile of otherwise idle mana into a permanent counter and a second creature. Because the ability carries no tap symbol, summoning sickness never gates it; the turn this lands, you can immediately spend the seven mana it takes to cast the 4/4 and fire the ability, though that is a late-game dump play rather than anything you curve into. The cost reduction is what makes the same-turn line reachable at all: activating on the turn it entered shaves the back off the , so you pay only to activate it. What shapes the whole design is the once-only clause. There is exactly one payoff here, a +1/+1 counter plus a 3/2 vigilant Hero token, and you choose when to cash it: on arrival for tempo, or later as a mana sink when a stalled board leaves you with mana to burn. That single-fire limit is the restriction that keeps a four-drop capable of eventually depositing a second body from behaving like a repeatable value engine. The vigilance on the token is the detail that pushes the ability past filler, since it widens the board with something that can attack without surrendering the ground you just claimed.