Whoa. That's quite a step up on Enrage. I guess it's similar to Untamed Might, but... wow.

I think it's too good for common, since it's creature removal and also unbounded player damage. But it would be fine at uncommon or rare. It's an X version of these cards that costs one more. Like fireball is to shock :)

Oops. I was only thinking of Untamed Might when I made this.

Although now I'm unsure. Link's right that if Untamed Might is common, this could be too. I guess strengthwise this is OK for common, but red gets less-good creature-pump in exchange for being the only colour to get direct damage?

It's better than Howl from Beyond... that's a pretty potent and memorable card to obsolete.

But then again, should red get better creature pump than black? Probably.

I've never even heard of Howl from Beyond or seen it before in my life. This does definitely obsolete Enrage, though.