Although Saber and Rider’s blades continued to slash the sea demon’s gigantic body with no respite, it showed no signs of being wounded.

Of course, it wasn’t that the Servants were holding back. The unyielding sword that clove rocks and the iron hooves that brought forth roaring thunder; they ruthlessly carved out the sea demon’s flesh, scattering them about in waves of blood and decay. However, the shredded wounds would be filled up by new flesh in the blink of an eye.

The demonic monsters that Caster summoned and commanded previously also had physical regeneration abilities, so it was not surprising. However, the giant sea demon this time was indeed enormous in size. It was as if they were digging a hole in a marsh; the damage of the two Servants combined cannot keep pace with the monster's regeneration.

Even the utmost effort and combined attacks of the King of Knights and King of Conquerors could only slow down the sea demon's progress towards the river bank by a little.

- Fate/Zero: Act 10, Part 2