PvE stands for "Player vs. Environment", it essentially means that the main focus of the map is to battle against mobs. This usually entails fighting your way through a dungeon, or trying to survive waves of enemies.
JekNJok's Monster Defense is a PvE map where you use RPG-style special abilities, Turret-like Wizard Villagers, your guts, your friends' guts, and more to survive through waves of incoming monsters from the depth of the Cursed Mine.
7 bosses. 5 arenas. Earn emeralds to purchase stronger gear, or play the survival mode and aquire parts to craft mythical items. Each boss has its own passive and last-stand abilities, and they'll bring their friends with them.
The troops of the arch illager are ravaging the world. To make things even worse, his evokers have finally figured out how to make use of empty spawners, which they have long been able to craft. It is your task to travel to an ancient, underground greenhouse complex and to set an end to whatever it is they figured out.