Cannot use my card

Jimmybourgeois

I have 17 boss order ( don't know why i can't have more than 4 ) and i can only put 3 of them in my deck , same thing happen with other card, i have 3 exeggutor V but can only use 1 in my deck ?

TechHog

Click the "available" drop-down and you'll see the other artworks.