You may exert Hydra Trainer as it attacks. When you do, target creature gets +X/+X until end of turn, where X is the number of counters on permanents you control. (An exerted creature won't untap during your next untap step.) {2}{G}: Adapt 2. (If this creature has no +1/+1 counters on it, put two +1/+1 counters on it.)
Near Mint - $0.20
Lightly Played - $0.20
Played - $0.20
Heavily Played - $0.10
Damaged - $0.10
Near Mint Non-English - $0.20
Lightly Played Non-English - $0.20
Played Non-English - $0.20
Heavily Played Non-English - $0.10
Damaged Non-English - $0.10
Foil Prices
Near Mint Foil - $0.30
Lightly Played Foil - $0.30
Played Foil - $0.20
Heavily Played Foil - $0.20
Damaged Foil - $0.20
Near Mint Foil Non-English - $0.30
Lightly Played Foil Non-English - $0.30
Played Foil Non-English - $0.20
Heavily Played Foil Non-English - $0.20
Damaged Foil Non-English - $0.20