User blog comment:Zambu/Useless passives/@comment-6187671-20130501115253

Passive is something that is supposed to help your champion. If u have a passive that does something, but your base stat that has to do something with passive is weak, the passiv eis useless. For example - new Lissandra, she has mana sustain passive, but she has so low base mana regen that makes her passive just compensate that stat. another example - thresh - he doesn't gain armor per lvl, but he gains it from souls.