Journey 15

The Witch of Calamity (災厄の魔女, Saiyaku no majo) is the 15th chapter of Marry Grave manga series.

Plot
Rosalie rescued the Mermaids from the Lich's grasp. And reveals there that Rosalie can combine spells and defeats both the Lich and his Jabberwock minions and saved a little Mermaid from being devoured.