The Dimension-Hopping Journey of the Avalon Sword Saint

My name is Merlin. I'm a mage, as well as a swordsman and an assassin. But most importantly, I'm a transmigrator. Not an ordinary transmigrator, but the kind who jumps all over the place... Look, a girl beside me who can pull books out of her body is fighting two girls who can turn into swords, but I'm not worried in the least. Because the shut-in queen next door is already on her way, spear of magic in hand...