Power

Card power
The power of a card depends on its rarity, level and number of stars. Power = Base * (Stars + 0.15 * Level)

Card stats
The attack and health value of a card depends on its power and class. Attack = ceil(2 * Class * Power)

Health = 3 * ceil(2 * (1 - Class) * Power) Class is a value between 25% and 70%, usually with 5% increments, and is an indication of proportion between attack and health. Class = Attack / (Attack + Health / 3)

Example
Shaman level 3, 3 stars: Base = 50.0 (common)

Power = 50.0 * (3 + 0.15 * 3) = 172.5

Class = 55%

Attack = ceil(2 * 0.55 * 172.5) = ceil(189.75) = 190

Health = 3 * ceil(2 * (1 - 0.55) * 172.5) = 3 * ceil(155.25) = 3 * 156 = 468