Create: Igneodynamics
Create: Igneodynamics draws inspiration from the vents and volcanoes in Oxygen Not Included, adding small volcanoes of various rock types to your world. Beneath the molten rock lies the core, which when activated produces massive amounts of magma that can be processed into valuable materials.
The game features volcanoes of all Create rocks, as well as stones from TFMG, some vanilla materials, and a completely new type to facilitate sulfur production. Molten rock can be turned back into solid form using the vacuumizing process from Create: Vintage Improvements.
A dormant volcano doesn't produce molten rock - it must be activated first. Any type of explosion will work, but TNT is the easiest method. After detonation, the block becomes active, but be prepared: if you don't pump out the fluid fast enough, the volcano can overflow and start spilling magma onto the surface.
Required Mods:
The mod works with all versions of Create