I really don't like Cryoclasm here. It's too cheap a land destruction spell when it works right, and useless when it isn't working. More importantly, though, is that it takes the focus away from mono-red fighting Aer, and encourages people to think that mono-red is fighting Mono-Blue and/or Mono-White.

This card, however, seems more appropriate to me. A situational blow-out card that doesn't ream a person for having too few lands in the early game.

I also just realized that Cryoclasm isn't common. Oops. Maybe it can fit in at uncommon, maybe not.
I would rather this be the other way around: "Destroy target land and all fortifications attached to it."

OK, I'm putting this in the skeleton, but I reserve the right to change round which way it's written :)

"Destroy target fortification and any land its attached to"?
"Destroy target land and any fortifications attached to it"? "Destroy target artifact and anything its attached to"?

I like destroying land and whatever fortifications that land has.

Reminds me of Turn to Slag or Murderous Spoils. I could go with either way round - "fortification and any land" or "land and any fortification".

Having played with it once, the "land and any fortification" seems much, much more sensible than "fortification and any land". OTOH, that way this can't kill Terrain Warping Beacon.

I don't see any reason why I can't change this, so I changed it. Terrain Warping Beacon seems like it wants to be a resilient card anyway. If it's too powerful, we can just change its numbers.