Past Life: The Entity

*Read the prequel "Past Life: Mystery of the Cave" first*

Alderne ventured deeper into the cave until...

He saw a mysterious entity. He was curious why the entity is there. The entity hypnotized Alderne, sending him to a trance, and, Alderne was dreaming of an impossible object in a 3D world, the Penrose tribar.
Mysterious Entity: Nothing is impossible in our world, welcome to the world of 4D. Things impossible in the 3D realm is possible here.
*the Penrose tribar rotated*
Alderne: Wow! That's unbelievable!
Mysterious Entity: "Wow" is the right thing to say. Walk this staircase please.
Alderne: There is no ending!
Mysterious Entity: That's right. Now I'll get you and put you up here. Then you'll know how the Escher stairwell works.
Alderne: I'm amazed!
*Alderne woke up from the trance*
Mysterious Entity: I'm Bardien. You dreamt of the realm I came from. The 4D world was destroyed, so I came to this realm.
Alderne: I'm sorry for your loss, I'd help you build it back.
Bardien: I will need all the crystals in this cave to fix the 4D realm.
Alderne: It's at home! Wait for a while.
*after 10 minutes*
Alderne: Ok I've returned with all the crystals.
Bardien: Thanks! I'll fix the 4D world.

*to be continued in "Past Life: The Portal"*