Something I thought really needed to be addressed.
srd wrote:Huge Magical Beast (Fire)
These reddish hydras can breathe jets of fire 10 feet high, 10 feet wide, and 20 feet long. All heads breathe once every 1d4 rounds. Each jet deals 3d6 points of fire damage per head. A successful Reflex save halves the damage. The save DC is 10 + ½ hydra’s original number of heads + hydra’s Con modifier.
Fire attacks cannot prevent a pyrohydra’s stump from growing new heads (since a pyrohydra has immunity to fire), but 5 points of cold damage does.
The same is said for the Cryohydra (with cold instead of fire). So here's my question, because (as usual) the RAW are vague.
Do all heads combined create a single jet (resulting in reasonable damage - only subject to ER once?), or does each head create a jet (resulting in way too much damage - subject to ER multiple (but nowhere near enough) times)?
See, if all heads combine for a single jet, on a 10-headed version (CR 11), we get 30d6 damage, subject to ER only once. Seems reasonable enough.
HOWEVER.
If each head creates a jet, on that same pyrohydra, we get 300d6 damage, subject to ER ten times. Umm... I don't think ER is going to help you much at that point, unless it's bigger than is reasonable for CR 11.
I'm fairly certain this was intended to be interpreted in the first way; still, I thought it needed to brought up. That can be misunderstood, and that would be really bad.