Stickytongue Sentinel

Most enters-the-battlefield return effects point at the opponent's board or force you to eat a self-bounce as the cost of reusing a trigger. This one aims at your own permanents and makes the bounce pure upside: rebuy an enters-the-battlefield creature you've already resolved, pick up a permanent to replay it, or, when nothing on your side is worth returning, come down as a plain 3/3 with reach and move on. The "up to one" clause is what keeps it from ever being a dead draw the way a mandatory self-bounce can be. It cannot rescue a threatened permanent in response to removal, since it casts at sorcery speed with no flash; the return happens on your own turn, as a proactive value play rather than a reactive one, and the thing you bounce needs to be a real card, not a token that would simply cease to exist. The reach is quiet but load-bearing on a green three-drop: a ground body that also polices the air, which is more than most green midrange creatures at this size offer. Nothing here is loud in isolation. This is a modular value piece that only comes alive when the board around it is built to be picked up and set back down again, supplying enters-the-battlefield triggers worth replaying rather than a threatened permanent worth saving.