can you help me. please?

Hello, I am playing the game The Clans Saga of the Twins and got all archievements alrerady - except the Cursed Souls.
I am DESPERATELY looking for an answer to how unlock it (I even did a walktrought trying to get a clue, but no sucess with it). so I am trying to contact anyone who had played the game AND got that archievement, to tell me HOW TO UNLOCK IT (because I already did LOT of things in the game... and still do not have the slightest idea of how to get rewarded by Sachiko...).

新春快乐！！！

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国庆快乐

中秋快乐 ~