User blog comment:ClariS/Why Xerath's Passive is Bad/@comment-141.136.246.61-20130317145707/@comment-141.136.246.61-20130317215740

I noticed I didn't answer one.

His passive gives a crucial strategic choice in a build, one that every good summoner is aware of: Will I build some armor, magic resist or both? His build allows him to go all armor or all magic resist. (Of course as a secondary option, AP is still the most important part.) In case of all armor, well, we all know what that means. And in case of all magic resist, slap some health, 500 AP, some penetration and cdr, and you got yourself a hard-hitting apc that won't die the second someone looks at him. To be able to dedicate a build like that, and not balance between the two is such a luxury, it's a special privilege of a limited number of champions. Very very limited.