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.)
: Adapt 2.
(If this creature has no +1/+1 counters on it, put two +1/+1 counters on it.)
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