Jade Guardian
Hexproof on a body this small is almost always a signal: the creature isn't paying for its stats, it's paying to be an answer opponents can't answer. As a 2/2 for , the rate is one no aggressive deck would look at twice, and that's the deliberate concession. What you're buying is a Merfolk that survives targeted removal, an untouchable anchor in a tribe built around cheap, replaceable bodies. The enter trigger is a one-time payout, a +1/+1 counter placed as it arrives, and where it lands is the real decision. Sequence it onto the Guardian itself and the counter inherits the protection: a hexproof 3/3 shrugs off the spot removal that would otherwise blank the trigger. Point it at a different Merfolk and the math inverts. That target is fair game, and an opponent can kill it in response to fizzle the counter entirely, so choosing where the growth goes means reading whether your board can afford to expose the beneficiary. The seam in this design is the familiar one. Hexproof shuts out one-for-one interaction and does nothing against a sweeper: a 2/2, or a 3/3 once it grows itself, dies to any board wipe like everything else on the table. It wins the single-target removal war it was built for while remaining wide open to the mass removal it never pretended to survive.
