Get the Clash Royale System at the Beginning of the End of the World

As soon as I crossed over, I encountered a zombie outbreak. Fortunately, there is a Clash Royale system. "Buy a small skeleton, cost 1 holy water." "Buy a lava hound, cost 7 holy water." "Buy a mortar, cost 4 holy water." You can get holy water by killing zombies, and you can also upgrade soldiers. When others are grabbing food, I, Lin Duo, have already become the king. This novel and its characters are purely fictitious. Any similarity is purely coincidental and should not be imitated.