Birel
The elf manage to jump back in time not to fall, but rock start falling all around. His nimble reflex let him dodge the rock.
"We have to stop this or we'll all die crushed down.", thinks the scout.
The elf look around for a way to stop the avalanche.
SpoilerMy reflex defense is 23... I am not hit.
I'll go with nature since you allow it and look for a way to stop the celling from falling onto us.
Nature : (1D20+13)[31] (not a 1 please)