“You may be inexhaustible, and you may be invincible –“
As if to catch him unawares, Shichika broke off midsentence and darted forward – leaping to the right side of Uron.
Then.
“So maybe you won’t die after one fatal blow – but what about a couple hundred?”
“Whuh…”
“A medley of Kyotoryu strike moves – from the Hinageshi to the Jinchoge.”
Just as Nanami had once done to Shichika, in their battle at Seiryoin Gokenji Temple – Shichika laid into Uron, pummeling his invincible body with two hundred and seventy-two strikes, unleashed at him from every direction.
Though unlike Nanami, Shichika was not able to use Harlequin Butterfly, and since he pulled none of his punches – each landed with incredible force.
As a result, Uron died two hundred and seventy-two times over.
At the very end – having expended all its lighting, bled dry, Akuto the Eel became a shell of itself, and slipped free from Uron’s heart.

Katanagatari Omnibus 4, Page 286