He opened the portal and walked through the first area, a small white room with nothing inside but a few broken parts of the ground. Lucifer nodded, before slotting the newly found sword into his left hand just below his waist, before lowering his body, right-hand inches from the handle.
"I order you to fight me with all you have, without using magic, just pure swordsmanship and physical combat."
The sword responded to his command, glowing brightly as it vibrated in a deep hum.
Lucifer closed his eyes and concentrated; it was like having a small part of his mind removed, replaced with vibrations; slowly, he felt something flowing through his body, changing everything about his movements and speed.
Then, he roared, forcing the vibrations to flow into his vocal cords, opening his mouth wide and roaring like an animal.
"GO!"