User blog comment:Vitios/Faeis, the Spellthief (Remade)/@comment-4794115-20130107230808/@comment-4794115-20130107233416

It's not just a limitation, its a total handicap. The idea of a spellthief is cool, but it wouldn't work like this. The strength of this character would be he could mix and match abilities, but if you build ad, you could never grab an ap's ability, so more then likey you'll just snatch the tanky dps's abilities and be an exact mirror, but minus the passive, so you are just a weaker version of that champion and will always lose.