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 - $0.50
Lightly Played - $0.47
Moderately Played - $0.40
Heavily Played - $0.30
Damaged - $0.25
Near Mint Non-English - $0.50
Lightly Played Non-English - $0.47
Moderately Played Non-English - $0.40
Heavily Played Non-English - $0.30
Damaged Non-English - $0.25
Foil Prices
Near Mint Foil - $0.50
Lightly Played Foil - $0.47
Moderately Played Foil - $0.40
Heavily Played Foil - $0.30
Damaged Foil - $0.25
Near Mint Foil Non-English - $0.50
Lightly Played Foil Non-English - $0.47
Moderately Played Foil Non-English - $0.40
Heavily Played Foil Non-English - $0.30
Damaged Foil Non-English - $0.25