Satorl Marsh - the following locations have the highest spawn rate (14%) for Rumble Part: * west of Barren Moor; look for the area with 3 sets of wetlands and the elevated C-shaped pathway * northwest of Barren Moor; the area is just a distance from the very large wetland * the area just before entering Lacus Swamp * Statue Summit * southwest of Soter Ruins * north of Lacus Swamp, at the far corner between the walls * the edge of the land at west of Zaldania Waterfall; it is just underneath the bridge * west of the Altar of Fate; look for the passage that leads to the earth elemental ether deposit * the south part of the land below the Altar of Fate