You don't. The spell of returning fails.

You frown in confusion as the spell breaks before you are tugged back. The summoning circle takes on a new color. Black. Apparently the challenge is not over for you since the circle takes on three dimensions around you. A blood-red mist spreads and obscures your sight.

You are suddenly and violently yanked somewhere beyond the circle.

You find that at some point you had fallen asleep and open your eyes. Standing directly over you is a demonic wolf, sniffing at your neck.