Using the Potion.

After making the deal with Mr.Dealer, Felix walked out of the house and followed the grey-robed man who revealed a hidden way of leaving and entering the underworld to him.

They made their way to the boundary of the underworld reaching a place where there was not a single person in sight.

Arriving at the farthest wall, Felix saw a similar black curtain attached to it with a person guarding there.

The gray-robed man approached the guard and handed him a few coins before calling Felix to follow him.

Felix nodded and walked behind the man as the guard opened the curtain and let them enter inside.

They made their way upstairs for some time and walked out into a dark room.

The gray-robed man opened the only door of the room and motioned with his hand for Felix to exit.

Coming out of the room, Felix glanced around and saw himself appearing inside the corridor of some tavern.