Talk:Introduction to Valkyrie Crusade/@comment-76.102.168.120-20140108011724/@comment-66.62.115.199-20140108012513

You can buy extra slots in the shop for jewels, as well as conquer one of the higher areas in campaign (I forgot which one, sorry), which has a reward of extra card slots.

There is also a collection, accessable from your edit unit panel, you can store cards there and buy extra collection pages for jewels as well.