Haha, I'm being a buzzkillington. I really want to like this card, but the cynical Spike in me is rearing his head.
Don't get me wrong -- I don't think it's a good card. I feel like exposing your land to creature kill/removal is always risky, and while it could be a good tool for a quick mono-red deck or a red-green aggro deck (especially late game) it's probably too problematic for most decks.
Unless... Crucible of Worlds is getting a reprint.
/magicalchristmaslanddreams