I have a really cool card (katana gx #117) but can't add it to a deck. I have no idea why

Winningjuleke

Please help me I just downloaded it today and want to create a cool deck game= tgc live

Justerfrog5557

Kartana gx isn't in standard format. You have to select casual → expanded to be in the right mode, and then change the filters to include all cards instead of just ones you already have