Shalom's drop rate - Are my F2P days finally over?

I've never spent a penny on this game. Never felt the need. I'm super grateful to Aisno for letting me enjoy the game to its fullest without spending money.

But Shalom's drop rate is ridiculously low. 8x10 failed attempts so far. All those hypercubes I had saved and all I got was Serpent S1 😢