RPG I: The Necromancer's Revenge

Ugh... yes, it's not hot... brr, I could really use a trip to the forge right now... and before that, the Forest, ugh, an emperor settled in the forest, he would have been better off under a mountain, another 8-10 miles...
U-u-u-u... *I look around. What do I see?*

This didn't help much, not much life was lost, but the demon lost a lot, it's time to call for dragons and everyone else who is here! A battle cry that is understood by all the children of Silanna, calling fire upon ourselves, spreads through the forest, and everyone nearby starts shooting at the demon. Only relatively high luck, compared to the demon, helps to avoid being hit by arrows, spears, horns, swords... The demon must die! Or retreat! I find my sword, take it in my hand, kill one archdevil, already badly wounded, and hurry to get out from under the mass bloodshed, oh yes, I'll add the demon to my list of sworn enemies, he won't give up! Even his magic won't save him now! Thank you, Silanna! The land we walk on and the forests we live in are our home, we must protect it!!!!!
CAN ANYONE TELL ME HOW DAMAGE IS DETERMINED? ACCORDING TO MY CALCULATIONS, WE SHOULD HAVE DIED A LONG TIME AGO!!!!!!