Matryoshka WT are empowered vessels used to give birth to Star Children through the several types of Classmating. They are found in Labyrinths, and are consumed when giving birth to a Star Child (although twins will only consume one Matryoshka WT). Alike all types of Matryoshka, they cannot be sold or bought. Matryoshka WT will give any newborn Star Child(ren) born with it the power of water.