This video is a review of the Mystery Case that rollercoin added into the game. Rollercoin often add a random stuff box into a game which is called lootbox, located in the shop tab, below miners. Many of this stuff are powerful. For rollercoin guide in general, go to Rollercoin tutorial.
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Rollercoin is a free bitcoin generating platform. Play games, collect power, place miners, and earn bitcoin continuously, increasingly day by day.
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this case expensive