Arborea Pegasus

The enters-the-battlefield trigger hands its flying to a creature that does not already have it, which is the whole point: a 2/3 flier is a serviceable body, but the value is in taking a ground-bound beater and pushing it over the top for a turn. The +1/+1 sweetens the deal, though the buff and the evasion both expire at end of turn, so this is an offensive tool, not a permanent upgrade. That makes it a repeatable trick only if you can blink or reanimate it: bounce the Pegasus, replay it, and the trigger comes back with it. On its own, the timing is the constraint. The evasion arrives at sorcery speed, when the creature enters, so you cannot flash it in mid-combat to ambush a blocker or represent surprise reach. You are committing to the plan on your main phase and swinging with a flier the opponent has had a chance to plan around. As a common-rarity creature built to reward a go-wide or evasion-based aggro plan, it is honest about what it is: a curve-filler that turns a stalled board into a clock for one attack step. The design lives entirely in that one-shot swing, and whether it is worth a card depends on whether that swing closes the game.