Failed to clear the 19th floor

(From Mc's Perspective)

Time progressed, After clearing the 17th floor. It took me an hour to clear the 18th floor. Then I appeared on the 19th floor.

19th Floor,

After appearing on this floor, I felt a solemn atmosphere. It took me a great deal of effort to reach here. Perhaps, My winning streak may come to an end. Fortunately, there were no elemental monsters in the previous two floors. So, I took my time to kill them.

"Common, Where are you?" I spoke in a low tone. It's been ten seconds, yet there is no sign of the monster's appearance. I feel a little off. Just as I pondered it I heard a loud roar. 

"Crocodile" I yelled in disbelief.

"No, no, something is wrong. Why is this monster's appearance so different? " 

My vision became clear as I spotted a terrifying monster near me. The battle field changes into sea. I'm standing in the middle of nowhere. "It must be an island" I mumbled under my breath.