Talk:Orianna/@comment-190.19.250.58-20130216052906/@comment-4729118-20130218150346

Even if they got just 50-100 Mres (probably somone will build Bulwark), each 1 MRes stands for 1% additional true health points (THP).

For example if you got 2000 HP and 100 MRes, your survivability is the same as for one with 4000 HP and 0 Mres.

Now image your enemy has 3000 HP and 80 MRes (5400 THP). Even sometimes squishies will get these stats. With MPen Boots and Runes and Masteries you will now have 28 MPen and 8% MPen. This results in 4380 THP. Now with a Voidstaff the THP would go down to 3600. You'll have to deal 780 HP less damage to kill him. For ~50 AP. This gets even more effective with higher MRes, since there will be at least 1 guy with over 150 MRes.

Just sayin' don't underestimate the new %MPen or MPen in general. It often deals more additional damage than a couple of AP.