Mobs, short for Mobile, is the term given to moving, living entities within Minecraft. Mobs are affected by the environment in the same ways as the player. Mobs can be damaged and killed by catching on fire, drowning, falling from heights, suffocation, falling in Lava, Cactus. Most land based mobs can be transported by minecarts.
Mobs within Vanilla Minecraft aren't too much of a challenge because they have low health and damage. The new mobs introduced by Divine RPG are very powerful with many regular mobs being more powerful than the Ender Dragon and The Wither.
A full list of mobs encountered within Divine RPG can be found Here.