Piece of Aerosiderite is Weapon Ascension Materials used to ascend weapons, increasing the stats and max level. Higher-rarity materials can also be crafted with Alchemy by combining lower-rarity materials from the same group.
Rumors of sea monsters are commonplace in Liyue, since the other-shore is an unknown region that lies outside of Teyvat. Without the protection of The Seven, all that lies beyond is unknown chaos. Only power beyond the order of Teyvat is able to stain the power of Rex Lapis black.
How To Get
Piece of Aerosiderite is obtainable from crafting and dropped as a random reward from completing the Hidden Palace of Lianshan Formula domain near Mingyun Village every Wednesday, Saturday, and Sunday.
Piece of Aerosiderite can be crafted in the Alchemy table in Mondstadt or Liyue using 3 pieces of Grain of Aerosiderite.