User blog comment:ImperiexSeed/Supernatural Mysteries/@comment-3481504-20120312215145/@comment-3481504-20120313173151

Unusable, no, it didn't exist, although Virgil managed to "make a call" in the Goblet of Blood utilizing Misha Collin's blood.

In addition to no magic, God and Death and everything else supernatural didn't exist, according to Sam. But God and Death likely could've traveled there and been unaffected.