Blue-green abysium dragons glow from within and are dangerously radioactive. They usually isolate themselves from others to avoid causing unintended harm and as such are often agitated by those who seek them out.
Required Creature Type and Subtype: Dragon (fire).
Suggested Alignment: Neutral.
Traits: Blindsense (vibration) 60 feet; darkvision 120 feet; frightful presence (CR 14+, 60 feet + 10 feet per CR); irradiation aura (see below); void adaptation; DR 5/magic (CR 13+, increase to DR 10/magic at CR 15, DR 15/magic at CR 17, DR 20/magic at CR 19); immunity to radiation; breath weapon (line 30 ft. + 10 feet per 2 CR, 1d6 F + 1d6 per CR); spell-like abilities (CR 8+); spaceflight.
An abysium dragon emanates radiation in a 20-foot radius. The maximum strength of the radiation is dependent on the dragon’s CR, starting at medium and increasing to high at CR 7 and severe at CR 19. This radiation suffuses at 20-foot increments as normal. An abysium dragon can’t suppress its radioactive aura, and it is considered a natural radioactive material for the purposes of remove radioactivity.
Starfinder Alien Archive 3 © 2019, Paizo Inc.; Authors: Saif Ansari, Kate Baker, John Compton, Adam Daigle, Katina Davis, Eleanor Ferron, Crystal Frasier, Leo Glass, Sasha Lindley Hall, Amanda Hamon, Thurston Hillman, James Jacobs, Jenny Jarzabski, Virginia Jordan, Jason Keeley, Natalie Kertzner, Luis Loza, Lyz Liddell, Ron Lundeen, Crystal Malarsky, Robert G. McCreary, Hilary Moon Murphy, Adrian Ng, Joe Pasini, Lacy Pellazar, Samantha Phelan, Jessica Redekop, Simone D. Sallé, Michael Sayre, Owen K.C. Stephens, James L. Sutter, Jason Tondro, Diego Valdez, and Linda Zayas-Palmer.