Each player begins with 30 health and an empty mana pool, receiving a starting hand of 3 random cards from their deck of 20 damage cards with mana costs ranging from 0 to 8. On a turn, the active player's mana pool refills up to 10 slots and they may play cards they can afford by paying mana, dealing damage equal to the cost. If a player's health drops to 0 they lose, and turns pass to the opponent if no cards can be played. Special rules include taking 1 damage if drawing from an empty deck, discarding cards that would make your hand exceed 5, and 0 mana cards playing for free but dealing no damage.