The Saint's Magic Power is Omnipotent Vol 10

Sei, a humble office worker summoned to another world, has officially been introduced as the Saint! But just as things begin to settle down, Sei and her friends are called to the Hawke Domain to investigate a possible black swamp. According to the village caretaker, the monsters springing up near the mine are abnormal. Just what makes these monsters so different? And can the power of the Saint cleanse the evil miasma still spreading?