Crit mallet, cuz you know you wanna

it would be option wouldnt get rid of current mallet. the crit icon would be added in picture to show its built from crit. i think this is cool would help people familiarize themselves with the stat icons. could have exact same passive or slightly modified one.
some ideas for passive tweaks here: http://boards.na.leagueoflegends.com/en/c/gameplay-balance/PrcBEki5-mana-rune-small-suggestion

edit: more than 150 gold less didn't calculate right if passive tad weaker would be like 3000 gold