Quote Originally Posted by Davek View Post
I think you're describing best scenarios only, when you're still safe and sound at turn 4/5 or even later and you're already trumping your opponents with Titans/Tusks/Eldrazis/whatever. But what when you're facing tough decks like RUG and they start the game by deploying a delver, promptly followed by a tarmogoyf and a wasteland on your precious post? i've found myself in these situations a ton of times and i won many times hiding behind glacial chasm while stocking resources to play our expensive spells, trying to outnumber their counterspells. Of course, Glacial chasm may have lost a bit of its appeal lately (expecially if you have decided to drop your expedition maps) but i think it still deserves a slot main-deck. It saved me countless times.
This is exactly my problem with Chasm. Against a deck like RUG, let's say, you're essentially gambling that the deck with 4 Brainstorms, 4 Ponders, and up to 4 G-Probes isn't going to draw its 2nd/3rd Wasteland before you're stabilized. 12post's plan vs RUG has always been to Show a Titan, and if you Show a Titan, you don't need Chasm to stabilize. We don't even need to talk about how much of a beating Thragtusk is for RUG to deal with.

I'm certainly not saying that Chasm is without its uses, and I 100% don't advocate dropping it from the 75(6). But I could see at least testing it in the sideboard and seeing if the meta is, as I suspect, more favorable towards running it in that slot.