Hearthstone is a online card game mostly pay to win but if u spend like 2-3 hours a day on it you dont need to spend money on it. So u mack a deck of cards or use preset ones and you play againest real players or bots. The only way to get cards is by spending money or getting 100 gold from quests. U get 10 gold from 3 wins or 40-60 from each quest. U make a 30 deck of cards by each class. Each class has its own cards and cards that can only be crafted for that class.