…well with that being said, it’s a conceptual weapon so explaining and understanding it is extremely difficult.
From the point of view of someone on Earth the enemy had their power reduced to one sixth, from the point of view of someone on the Moon the enemy had their power multiplied by six…. and both the Earth and Moon have the right to make the situation bend to their point of view, but clearly this Noble Phantasm is the realization of the “Reduce the enemy’s power to one sixth” point of view.

Fate/Extra