A pair of transition pieces that allow you to connect the older Caverns lava river tiles to the new magma rivers, or transition them down to Terrain Trays and Phantasmal Filters.
Magma River Demo:
Canvas Tote Bag - KS2 - Caverns
Cavern Set - Varied Walls and Floors - Unpainted
Lava River Pack - Unpainted (Yellow Dwarvenite)
Cavern Floor Pack - Unpainted