User blog comment:NicknameMy/Stop the freakout about Mordekaiser, some math./@comment-24420226-20150216163034/@comment-3493296-20150216170435

You can't build damage Morde with the rework, it just doesn't make sense at all, especially conisdering the three core items are a enough to bring down the enemy frontliners. Building AP on him would be as efficient as building AP on Mundo. Mundo also uses magic penetration in order to increase his spell damage. Other similar champions are Rumble.