Green Kasparov Crystal ???? WTF

[Yizzn]

I saw some ppl with Green Kasparov Crystal's
Is that Legit ?
and if it is no cheat could anyone Enlighten me how to really get it ?

My attempt to find any Answer on the Internet failed totally

Well even the Violet one is not in the Item Database ...but i know how to get that one.

[powbam]

https://grimdawn.gamepedia.com/Hargate's_Mysteries
https://grimdawn.gamepedia.com/Kasparov's_Gamble