Battlefield
Since patch 5.3.0, battlefield skins now give a unique buff in addition to being a cosmetic. The buff given by each individual battlefield skin can be viewed below.
The battlefield buff effect can be leveled up using gold. The maximum level for the battlefield skin is your pvp rank, meaning that level 20 is the maximum level for all battlefield skins. Below is a table showing the cost to upgrade the battlefield skins. It takes a total of 413100 gold to upgrade a battlefield skin to max level.
In co-op mode, the battlefield from the player with higher pvp rank will be used. If both players are the same pvp rank, the battlefield used is randomly picked.
Default
Attack Bonus 2-5%
Obtained from the beginning.
Increases basic damage.
Final Colosseum
Slow Effect : Up to 20%
Obtained from: Store (500 Diamonds) / Main Quest -33
The battlefield spawns 1 sand swamp (2 sand swamps in coop) at random location that last(s) for a limited time before being replaced, slowing the enemies that cross the sand swamps on the track.
Skins
Sweet Swamp
Unlock condition: 10 Skin Puzzles
Lava
Effect
Club:Violet
Effect
Pantheon
Effect
Fifth Voyage Log
Effect
Skins
Shipwreck
Frost Crystal Rift
Effect
Plasma Shield
Effect
Skins
Moonlight Ocean
15 Skin Puzzles
Luminous Prism
Effect
Skins
Sunlight Ocean
15 Skin Puzzles
Void
Effect
Skins
Icy Planet
1000 Gems
Blessing
Effect
Skins
Origami Land
10 Skin Puzzles
Goldmine
Effect
Scope
Effect
Magic Breaker
Effect
Quantum
Effect
Ancient Summoner
Effect
Skins
Halloween Night
15 Skin Puzzles