Re: Hydra
I was trying to keep the dynamics simple, and in line with the other monsters, so I felt I could only add one new symbol (roll & fight again) without it being too complicated. I don't like the idea of removing a dice, as that makes the Hydra weaker on each turn. The point of the Hydra is that it gets *worse* the more you fight him. Adding a dice makes sense conceptually, but I thought that'd be too complicated to indicate on the monster dice.
Coates indicated to me that the Hydra might be an epic monster - in which case, I suppose it could have a different set of rules than the regular monsters. As a boss-level creature, involving a cooperative kill attempt from many players, a combination of fighting it 2-3x, and each time adding another dice to the Hydra, might be do-able, and a very fun challenge.