Okay, so the monsters in Heroes Keep are the property of Nexon. I do not in any way, shape, or form take the monsters as my own.
A Monster's HP can be determined like this:
Level x Level.
The MP is the level x10, unless the level is under 60 in which it is 1/2 the level.
A Monster's level is the number on a die that it is. I will roll a die to demonstrate