Health acts like energy, but can only decrease in battle. You can use protection orbs to keep your health. If your army is standing they will take damage on your behalf, allowing you to battle more enemies without as much risk to your health. Your hero cannot die, but be warned: if you run out of health points, you'll need to return to your kingdom and wait for your health to replenish (or use crystals to replenish your health more quickly).
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