That's a request :-)

Could it be possible to see one day the card "war hydra" clarified in the same way that Flagellants have been?

Making this card a little bit more playable than actually :-).

Forgive me my ignorance, but what is the problem with the War Hydra?

War Hydra : Place 5 resource tokens on this unit when it enters play. Action: Remove a resource token from this unit to cancel 1 damage assigned to it. Then add 1 resource to your pool.

In the actual state of the card you can only use this action to cancel damage assigned during combat and during the action window just after the assignation step of the damage, before the application step of the dammage.

You cannot cancel damage from sniping effect with this action.

Ahh so it needs an errata not a clarification. I do not think that your request will be fulfilled

I hope... one day, the Flagellant have been . They now can be used against indirect and direct damage.

And actually the war hydra is just useless and the erata would not make it "broken"