疾生多头龙

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Rulings:

• 11/10/2020 Because Stumpsquall Hydra’s ability doesn’t target, you choose how to distribute X +1/+1 counters as its ability resolves. Players can’t take actions between the time you decide this distribution and the time counters are put on the appropriate permanents.
• 11/10/2020 You can’t put +1/+1 counters on commanders that aren’t on the battlefield.
• 11/10/2020 You may put +1/+1 counters on commanders that aren’t currently creatures (such as Tevesh Szat, Doom of Fools).
• 11/10/2020 If Stumpsquall Hydra leaves the battlefield before its triggered ability resolves, you can still distribute the counters among any number of commanders, including none of them.