The Mysterious Cave is a Lost Island building located in Lost Island, east of Lost Pyramid. It was originally introduced on June 08, 2017 as part of the timed quest called Treasure Hunt.[1]



Mining Game

Mysterious Cave Game
Task of the mining game is to burst earth (brown) and stone blocks (grey) with tools to obtain materials (only for lost island buildings), Ancient Coins 15px-Ancient_Coin_%28Lost_Island%29.png , artifacts 19px-Artifact_%28Lost_Island%29.png, coins Coin sm, tools, chests or explosives that explode instantly. The cobblestone are indestructible. The tools can be produced at three different workshops (Workshop I, Workshop II and Workshop III) or can be purchased with Ancient Coins 15px-Ancient_Coin_%28Lost_Island%29.png or Megabucks sm.

Effects of the tools:

1 block; simple burst effect[2]
all blocks in 1 row; simple burst effect[2]; can be placed only on empty fields
to 8 blocks (on the line of the placement); can burst earth and stone; can be placed only on empty fields

Some blocks are covered because they are outlined of other ones that have to be bursted to uncover them. When a block below the grey line - layer counter on the right side - is burst open, the grey line (layer) move down. Chests can be opened by 1 Megabucks sm and comprise materials, Ancient Coins 15px-Ancient_Coin_%28Lost_Island%29.png , artifacts 19px-Artifact_%28Lost_Island%29.png or tools.

Mysterious Cave Vault

Every 50-60 layers there appears a vault full of different presents.

On the last day of the contest the player get an offer which multiply the amount of artifacts, that can be excavated, by two.


SQ Internal Info:
  • Name: Таинственная пещера (translates to Mysterious Cave)
  • ID: 20101264 (mysterious_cave)


  1. SQ Forum: Update 06.08.2017
  2. 2.0 2.1 Can burst earth on first application; for stone blocks it needs two tools of this sort
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