I just now noticed that Rageblade gives an insane magic damage on hit once you hit 8 stacks.

I forgot about this item, but now looking at how it gives you stacks of AD, AP, attack speed AND an AREA OF EFFECT on hit (that goes up near 100 magic damage) how are people not using this item?

Or are lots of people actually taking advantage of it and I'm just not running into them? I just tried a more AP on hit style of Kog maw (Rage blade, Nashors + tons of AP to abuse W) and it was doing some fun amounts of damage. Anyone else trying out rageblade? It had been seemingly useless for so long but now it actually looks kind of scary.