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Hydra Trainer
Creature — Human Warrior
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.)
2 generic mana green mana : Adapt 2. (If this creature has no +1/+1 counters on it, put two +1/+1 counters on it.)
Rulings (7)
If a creature somehow loses all of its +1/+1 counters, it can adapt again and get more +1/+1 counters.
Jun 7, 2024
The value of X is determined only once, as the reflexive triggered ability resolves.
Jun 7, 2024
You don't choose a target for Hydra Trainer's first ability at the time it triggers. Rather, a second "reflexive" ability triggers when you exert Hydra Trainer this way. You choose a target for that ability as it goes on the stack. Each player may respond to this triggered ability as normal.
Jun 7, 2024
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