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Your luck is:

Place 8 spins on any of the following games: Caligula, King of Wealth and Joan of Arc and get 8 free spins on a mystery game.
T&C:  All winnings generated from the awarded free spins will be paid out in real cash and NOT subject to additional wagering requirements. The player has to place 8 spins on any of the above mentioned slot games until 00:00 Monday UTC. Free spins will be awarded the following day and expire at Thursday, 26th, at  23:59 UTC