Moon Water

Moon Water (月水) is a substance obtained from Pu-ryao. It grants immortality when consumed, but this is undesirable for Rin as it is the sole source of a Game Over in Eastern Mind and should be avoided by the player.

The Sun Water is a direct antidote to the effects of the Moon Water, and drinking the Moon Water with it will cancel its effects.

Tong-Nou Book Entry

Water drawn from the Moon. One drink will lead you to immortality, the Life of Gold.