Erza and Gray continued down the hall for what seemed like forever until they found a hallway of doors they started to check each one which really didn't have much in them. They finally came to the end of the hallway and found one single door.
"This is the last one." Gray said, "Kireba maybe in here."
"Open on three." Erza said, "One… Two…"
"WAIT!" Someone shouted down the hallway. It was Happy slowly tiring out. He panted for a while before saying anything else.
"Happy what is it?" Gray asked.
"There's… a… shadow… creature… heading… here…" Happy gasped.
"What are those?" Gray asked as he opened the last door only to see a shadowy beast in front of him. He immediately closed the door.
"We should run." Gray said with his back against the door and the beast scratching against it.
"That's it." Happy said.
"On three, Gray, you freeze the door shut then create a few walls if that fails, I'll stay behind and fight it off." Erza planned.
"Alright." They both said.
"One… two… three!"
Gray froze the door shut and created a few barriers and two walls to contain it. An ear shattering shriek echoed through the hall as it burst out the door and charged though each barrier using the shadows on the other side of every barrier.
"My Ice must be see though." Gray commented as the creature steadily caught up to them.
"Well, Soul said that they were creatures of hell so really they seem really strong." Happy said flying slightly ahead of Erza and Gray.
"Alright, thanks for the information Happy." Erza said turning around to fight the beast. It stopped as it was ready to attack. Soon Happy realized they were now back where they started, the main hall.