Stratus Walk

Flying-granting Auras have always carried the threat of card disadvantage: spend a card to make your creature harder to block, eat a removal spell, and now you are down two. This one answers the oldest complaint against the genre by replacing itself the moment it lands. The draw is keyed to the Aura entering the battlefield, not to the creature surviving past the turn, so the card pays for itself on resolution. The window matters: if removal answers the target while the Aura is still on the stack, the Aura has no legal target, fails to resolve, and the trigger never fires, so the trick is to resolve it cleanly rather than into open mana. Once it sticks, even a removal spell on the following turn leaves you even on cards, with the evasion riding for free on a spell that already broke even. The defensive clause restricting the enchanted creature to blocking only fliers is a genuine cost that keeps the card honest, though it rarely bites on the attackers these Auras are built to ride. It descends from a long line of cheap blue flight-grantors stretching back to Flight itself, and the cantrip is where it parts ways with those ancestors and with its closest functional cousin, Spectral Flight, which buys a stat boost where this buys a card. As evasion enabling, it is the version that does not ask you to gamble on the creature outliving the investment.