Rune of Sol

Rune of Sol is a post-Moonlord summoning item for the boss Flawless, God of the Sun.

To do it, you need a Rune Mold, one Astral Sun Fragment, one Molten Moon Fragment, one Lunar Star Fragment and seven Luminite Bars. The Rune of Sol is made on a Demon Altar. (our it's counterpart, Crimson Altar.) It is not consumable, so that you can try defeating Flawless, God of the Sun over and over without the need to defeat The Unblemished Trio once again to get the Rune Mold.

It has the appearence of a gray rock, with a yellow tribal sun in the middle. The description reads as follows: "A rune with the power to summon god's."

Trivia

 * Sol means sun in portuguese/latin derived languages.