Everyday you can get a 'free' 4star card.
Reach 70 activity and get a Pink gem, which are used to enhance 4star.
Costs 18.000 silver or less.
Make at least 2 decks.
1. For PVP dont use creatures whose time to use (cooldown) is high.
2. For hard PVE fights, make a full vigilance deck, with some skills.
