Quote Originally Posted by joemauer View Post
I don't think cavern of souls is a good idea in elves, I could end up wrong though.

One of elves strengths is being wasteland proof. Very rarely do I care if my creature gets countered. Removal is more a problem than counters for elves. The only creature that I typically need to resolve is scavenging ooze, not an elf.

In fact, I believe the non creature spells are more important to resolve:GSZ, Glimpse of Nature, and Natural Order. However, if counterbalance ever became a DTB again than this land would be a staple in at the least our sideboards.
I aggree with you. Adding Cavern to our deck makes wasteland a good card against us. And on top of that you can't cast Wirewood Symbiote (insect) & Regal force with it, and those two are pretty hardcore for us.
Add the fact that Glimpse & GSZ are also key spells for us and I don't think I want this land in my MD.
About the CB-MU: when it was heavily played I used Leyline of Lifeforce as a trumpcard.