I don't think the DR helps. The rules for damage reduction says “A creature with this special quality ignores damage from most weapons and natural attacks. […] The creature takes normal damage from energy attacks (even nonmagical ones), spells, spell-like abilities, and supernatural abilities.” Falling damage isn't damage from a weapon or natural attack, so I don't think DR affects it.Incidentally, an Ancient Red Dragon has DR 15/magic although it seems that DR technically doesn't apply to falling damage.
Statistics: Posted by b_jonas — 30 Jul 2024 15:49