True story.

I was playing extended tourneys and a great deal of the player base was running affinity (about 8 of the 13 there) so I made an artifact hate deck on the assumption that in the 4 rounds the tourney would take place in, I would have a fair chance of playing only against affinity. So I filled the deck with anything that could take out artifacts either singly or en masse. Then slapped in 4 Hum of the Radix. It was a massacre, over the course of 3 tourneys (3 weeks) I forced all the affinity players to play something else, because their decks just couldn't do anything against mine.

Yay for having brains.

In a nutshell, this card is not solely designed to stop Affinity all by it's lonesome, it needs support to really shine.