A-Briar Hydra

Not yet bracketed (or genuinely unplaceable).

A 4-mana 5/5 trampler that distributes X +1/+1 counters (up to 5 in full domain) on a creature you control when it deals combat damage. Signature in counters-voltron shells where it can snowball a single creature, and in domain-themed midrange. Green mono-color identity limits domain potential severely — reaching 5 basic land types is nearly impossible without a partner or off-color fixing; the card is only legal in Brawl (not Commander), and mono-green Brawl caps domain at 1, making the trigger far weaker than intended.