User blog comment:RoznosicielCiast/CCC5 - Yngaire, the Queen of Thieves/@comment-6000413-20140908103709

The crown is too powerful if sold at lvl1: you can grab a second doran and just collect kills. It should have a base value of something like 2-3 gps or 2-4 gp minion, so you ALWAYS have to wait to get it. Otherwise, it's just a +450 gold at lvl1, in the current "try to win as fast as possible" meta. Especially since she is an assassin.

To match the concept she should have some kind of sneaky effect on turrets. And steal from them and inhibs. Or something like: disable them when there are no enemies around (but that would go against recent Riot policy of removing abilities that interact with turrets).