The Mystery Slime Island is one of the many fishes that can be acquired in the Frontier. It is a collection of slime creatures that can be found in the following bodies of waters:
The Mystery Slime Island is a collection of small slime creatures stacked on top of each other, with varying hues of green, blue, yellow, and purple blended into one. It sits on unknown materials surrounded by what appears to be a blue plate acting as the waters of the Mystery Slime Island.
The Mystery Slime Island cannot be used in any shapes or forms, however, it can be consumed by the players in order to restore 100 HP back to their health pools. In addition, players will be granted 100 jump power points, boosting the player's capability to jump higher temporarily. Other than that, it can be sold to a selling vendor at a selling price of 15,000 gold.