Different Biomes can be found throughout the Season 4 stages. They are status effects that can give Heroes of some elements a boost while Heroes of the opposing element, may gain a disadvantage. The Biome effects can also give enemies an innate resistance against certain status effects or ailments.

The Biome effects can be viewed by tapping on the 'Biome Effect' icons under the Stage Name before beginning a battle in the Underwilds or by tapping the icons on the left side of the screen during a battle.