Complete each of the following Essence encounters.
Defeat Essence Monsters (0/90). Players encounter groups of monsters with a rare one in the middle possessed by one or more essences, each granting him a special ability. These monsters are trapped and don’t perform any actions until the player clicks a few times on the possessed rare to release the whole group. When the possessed monster is killed the essences will drop as items.
Gain Essences from monsters (0/250). Monsters trapped in essence crystals can occasionally be encountered in most areas starting from Act 1. Activating the center essence crystal three times will break the crystals, freeing the trapped monsters. The essence item can be obtained by killing these monsters, which are also enhanced by special monster modifiers on the essence.