A technique that manipulates strong acid from a volcanic mud flow to corrode flesh. The Fifth Mizukage changes chakra inside her body into a powerful acidic fluid, that will melt anything. From her mouth the she spits out the viscous fluid, both shape and the amount are determined by her. By spitting it out at short range the techniques speed increases. By distributing the liquid across a vast range, she creates an acid wall. Anything that touches it will crumble and loose its shape. Should her initial attack miss, a great deal of smoke is created by the effects of the acid. So a follow-up attack can be conducted while the enemy's vision remains obscured.
The phrase "Melting Apparition" (溶怪, Yōkai) is a pun on the Japanese words "apparition/demon" (妖怪, yōkai) and "dissolution" (溶解, yōkai).
In the anime, up until Mei's fight against Madara Uchiha, this technique for the majority of time was colored to look like lava. During her fight with Madara, the substance produced by this technique appears closer to its manga adaptation, with colour, and texture.