The Beast (Earth-Prime)

"Your blood will smear the walls. Your screams will fill the air. Forever here, forever mine, forever."

- The Beast to the Legends

The Beast was a fictional villainous character in the board game, Beast/Slayers. When John Constantine used a spell to bring the Legends of Tomorrow into the board game, the darker side of his mind was given an opportunity to present itself as The Beast, later even escaping the game and entering Constantine's mind.

Beast/Slayers
"You never wanted to confront the part of you that sabotaged all your relationships, doomed your lovers. The game made that possible."

- "The Beast" to Constantine

When the Legends entered Beast/Slayers, John Constantine used his imagination to fill the gaps while the spell followed the rules of the game. However, Constantine's use of an enhancing potion allowed his darker self to present itself as The Beast and fueled itself with the addiction. The Beast then proceeded to kill the Legends one by one and was eventually confronted by Constantine in the attic, where it revealed itself and was stabbed to death by Zari Tarazi. The injuries later retained on Constantine's back, confusing and frightening Tarazi.

Powers

 * Superhuman Strength: The Beast was able to easily overpower Constantine and lift him with one hand.
 * Telekinesis: The Beast was able to throw Constantine easily with one hand while hiding within his mind.
 * Possession: While using Constantine's appearance to haunt Constantine himself, The Beast was also capable of possession the body.

Abilities

 * Stealth: The Beast concealed its movement through lightning and thunder strikes, allowing him to kill its victims at an immense speed without being noticed.