What are the effects of rune stone, the legendary artifact of Knife Tower?

There are four known runes: the sun rune, the morning star rune, the residual light rune and the crescent moon rune.

From the collection of fragments, more and more perfect rune stones can be synthesized through continuous synthesis. The higher the rune stone level, the higher the relative printing property, which should be better understood by players who have played the gem system.