I've been playing Darksiders. In the course of beating the souls out of dumpsters, traffic cones, and sign posts, I discovered a Fallen Legion Artifact.
The game helpfully popped up "Ooh, take this to Vulgrim and be rewarded!" So I did, and on Vulgrim's interface there was a new "press R to trade artifacts". I did so... and nothing seemed to happen.
The button disappeared, so I think I did trade something, I'm just not sure what I did. What does trading artifacts to Vulgrim do, and is there any reason not to?