Waterspout Warden

The evasion here is conditional in a way that ties the card's clock to the board development you were already doing. It attacks as a 3/2 ground creature by default, and only lifts off if another creature has joined your side that turn: a token, a second spell, a flicker, anything that trips an enters-the-battlefield count. That coupling is the design logic. Rather than granting flat evasion or asking you to pay for it turn after turn, the card rewards a go-wide tempo plan by turning the extra body you just dropped into the reason your attacker gets through. The flying only lasts until end of turn, so each swing has to re-earn it: a leash that pins the payoff to how fast you can flood the board rather than letting a durdling deck bank a free evasive threat. The 3/2 body matters to the math. It wants to be attacking early and often, before blockers stack up, which is exactly when a token-heavy start is generating the extra creatures that switch the trigger on. This is a payoff built to sit at the top of a curve full of cheap creatures, an incentive to keep casting rather than a standalone threat, and the deck it wants is one where playing a second creature each turn is already the plan.