Magma Vents are Tyranid plants that burrow deep into a planetary crust, down to just shy of the the mantle. These plants then vitrify to form hollow tubes. These tubes release the gas trapped in this planetary layer. The gases further the consumption of the planet. The relationship between Magma Vents and Magma Corers is implied, but not substantiated.
- 1: White Dwarf #254 (US), "Hostile Terrain" by Pete Haines
- 2: White Dwarf #254 (US), "Tyranid Planetary Assimilation Analysis" by Sherman Bishop