You can win this cards from offline Story Mode.

Heroside

Alive Aqhu 4-3 or 5-1 quest
Broom 9-2,10-1
Territory 10-2,11-1
Madness 11-2,12-1
Mc Guard 12-1,15-1
Heavy Blow 15-3,18-1
Bullet Storm 17-3,18-1
Chain Sawd 18-2,22-1
Harisen 20-1,21-1


Darkside

Canadine 4-2,5-1
Pal Shark 7-2,10-1
Cave Wind 9-2,12-1
Companion 10-2,11-1
Mighty Knukle 11-2,14-1
Round Slay 12-2,20-1
Pan Arms 15-2,18-1
Split Boost 17-3,20-1
Punch 19-2,21-1

Most are common cards.