User blog comment:Tommy Young/Tau, the Spell Stealer/@comment-184.175.18.89-20120725191029

i cant beleve ili be saying this about any champion in the design concept list, but this champ is quite weak, there are two main problems with him, the first one is he basicly is a champ who has no ult and dosnt get anything in return, most champs with ult like those (udyr, jayce) have other abilities that are stronger then standard champs, this one however, simply takes a spell from the enemy, which means even if he steals the BEST spell in the entire game (whatever that may be in your opinion) he is still a champ with 3 spells running around, while others have 4, and nothing to compensate for it. the second issue is his scaling, his ability to steal as spell is relativly weak early game (10 second window of use and 30 sec cd) that will not allow for good spells to be kept for a long duration of time, meaning that he wont be able to lane well, (simply because the other champs will have the same spell available for longer and more frequently then him) and when those two spells actualy scale when he gets higher level, when the teamfights start, it will be lost in the chaos of battle, it will be extremly hard to steal the spell you want when you need it.

if you want any edvice (and i will understand it if you dont) you might wanna move his spell stealing ability into lets say slot 2 and 3, remove one of his spells, and give him some kind of an ultimate (without making him overpowered at the process)