Any reason the dragon tooth doesn't just "champion is also a dragon"?
It stinks that the item can pretty well shut down any comp whos primary damage source is an ability like Katarina/MF. Why not at least make them have to commit to certain units to benefit?
If you are entirely reliant on one damage source then that's your mistake.
If it made them a dragon, you would also get the synergy of other dragons. For example, if I have a Shyv but no other dragons, no one has the buff. If I drop a Dragon Claw on Braum, currently only Braum gets the magic reduction, but if it gave the dragon synergy, then Shyv would ALSO get the reduction.
Plus, you can put a claw ON a dragon, and they get double reduction (yes it's a bad idea, but it's possible).
Same thing when you run purely auto attackers and you get an opponent with full armor.
Would contracdict the spatula as the only class changing item.
(But dont even ask me why Negatron+Spatula equals freaking Hurricane instead of Dragon!)
