Gaming Mugen Frontier Stuck in Poker Castle

[blahman]

SO after defeating Kaldia the android thats sorta like Aschen where do I go. I got lvl 2 card key after defeating her. I been wandering all over the castle nd also back to the town cant find a way to go. I still cant break any of the blue or red crystals.

 

[Rock Raiyu]

After you go back to the town, go south east to where you see a grey spike looking thing. Go in there.

 

[blahman]

thanks for that