Touken Ranbu: Please Become One with Us

After their master devoured them, most of the surviving sword tsukumogami in the Honmaru had fallen into corruption. Their spiritual power was nearly spent, their forms were on the verge of collapse, and they were about to return to their cold true forms and vanish completely into the void.

At the edge of despair, a ripple in time and space heralded the quiet arrival of a dark parasitic plant from the abyss.

It reached out with supple vines and wrapped them around each withered soul, offering its own spiritual power as bait and granting them the hope of holding on a little longer.

Then accept this gift, and become one with them completely, from flesh and blood to soul. From now on, you will never be apart.