Originally Posted by Mitrax
Why would I even open new tread If I wouldn't have exactly correct stats. Why would I waste my own time and eventually yours by trying to lie to anyone checking this thread?
What im trying to do Is understand the mathematics behind his spells and attacks.
A link with explanation of MP and what lowering MR does would be very helpful, anything that will bring be reasonable answer
Don't be a smartass. It wouldn't be the first or even the 1000th time someone has posted something sensationalist without having correct information. Also if you bother to read my entire post, you'll see the answer was in there, and was confirmed by others afterwords.
Damage Reduction = Total Magic Resistance / (100 + Total Magic Resistance)
Magic penetration allows spells to bypass magic resistance without going negative. Magic reduction can go negative and is applied before penetration. It will also lower their resistance for everything that hits them(including your allies abilities)