Merge system

The game has a Merge system. With its help, the player can increase the level of building cards by combining them into 3 or 5 pieces of one rarity and one level.

If you combine 3 cards, you can get 1 card of the next level with the same or increased rarity. If you combine 5 cards, you can get 2 cards of the next level with the same rarity or 2 cards of the next level with increased rarity. At the same time, when combining cards of the last level with a certain rarity, you are guaranteed to receive a card of the first level with increased rarity.