In vanilla, it's a 200 fatigue spell, meaning you really do need a 3B 1W mage to cast it or a booster. Either way, you reduce the frequency considerably. It's CBM's change to 100 that really puts the hurt on, allowing any 2B 1W to pop it.
As for intent... well, we can just assume that Mictlan and Jotenheim have "immunity to SC" and see what effect it has on gameplay
