Evos are creatures that can be found in Dungeons, obtained from chests (Treasure Rooms), or obtained from Portal summons.
If an Evo is encountered in a dungeon it must be hit 1x in the first round of the battle to collect it. All Evos are beaten after one hit. If a Evo is not hit at least one time in the first round it leaves the battle field and is lost.
Evos are used to ascend your Heroes to unlock new abilities and traits, and all heroes can undergo two ascensions. Evos come in many different forms, and there are multiple stages for each type of Evo. Evos can be classified by their element or by their class. The four classes of Evos are; Larva, Evo (no additional name besides their element), Monarch, and Celestial. Below is a list of all currently known Evos.
Larvae Evos
Small, unhatched, common type.
Evos
Medium sized, small-winged, uncommon type.
Evo Monarchs
Plump, large-winged, rare type.
Celestial (Class) Evos
Visually similar to Evos or Evo Larvae, dual-colored and glittering; the very rare type.