There are ten floors in Wyvern's Nest dungeon. This dungeon is filled with different kinds of Wyverns like fire wyverns, wind wyverns, crystal wyverns, poison wyverns and many more.
On the first four floors of the dungeon, there are Wyverns ranging from C+ to A rank.
On the fifth floor of the dungeon, there will be a boss Wyvern that will be at A+ rank and its power will be slightly stronger than a normal A+ rank monster.
After the fifth floor, all the wyverns will be above B rank and there will be many A and A+ rank wyverns on these floors.
Evan has to leave for the central city in two days, so he was thinking about reaching the fifth floor in these two days.
If other people heard Evan wants to reach to the fifth floor of an A rank dungeon in just two days they will think he is insane.