End the Mighty Castle
A single stone structure, such as a castle, keep, or manor house, crumbles to dust and small pebbles. Anyone inside at the time takes +10 damage from falling having stones land on them, possible more if the structure is particularly large.
On Page 181
Inside collapsing stone building +21
The spell leaves a LOT of room for interpretation. The second is very clear.
Now I understand that having dust and pebbles fall on you is slightly different than rocks, but fifty tons of rock, or fifty tons of pebbles still hurt...
One of these is wrong.....????
Or is it assumed that you would take choking damage from the pebbles and dust...
Ah, but true...No argument, but you forget one detail here...
The spell also includes falling damage.... (+1 per two feet...)
So if you are about halfway, and the building collapses, you fall, and all the stuff falls on you. So if you are thirty feet up, you should take +15 and any additional 'crushing damage'.
[shrug] just seems the damage is 'not right'
You assume that the "dust and small pebbles" have sufficient cohesion to bury you , and crush you.
(because it is a Perdo effect , the destroyed stone becomes a worse example of natural stone crushing you)
The spell should probably say that you take +10 crushing damage
and extra damage based on how far you fall when the spell takes effect.
A House is Size +05 / A Castle is Size +10 or larger. (C&G , page 77)
Take the default size as a House (single storey) , and scale damage accordingly.
The spell is worded sufficiently vaguely to allow extra damage after all.