The River of Illusions, the ultimate escape from reality. An endless dark blue river that contantly gives a spiritual feedback to your inner dreams, wishes and gives such strong believability that it's truly like experiencing them. There is no end in sight once you enter and you won't leave the place until you've experienced the full scenarios of your dreams. It may seem like years, but it goes by quickly in real time.
The mystic fog-like entity controlling the powers only let's through people once every 20 years due to its constant demand and powerful magics.
The power sucks years off of your life span, so one should make sure whether this unique experience is truly worth the sacrifice you're making.