Hydra Trainer common put a +1/+1 counter on

put a +1/+1 counter on this creature

"When you said I could learn a lot from a corpse

it can't attack or block

you gain 3 life and suspect up to one target creature an opponent controls

target creature you control other than enchanted creature gets +2/+2 and gains vigilance until end of turn

Hydra Trainer common put a +1/+1 counter onSet name Modern Horizons 3 You may exert this creature 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.)