Use the following template graft to create a unique marrowblight of any CR.
Required Creature Type: Undead.
Suggested Array: Combatant.
Traits: Spur attack that causes disease (Fortitude save should be appropriate for CR); pounce.
Starfinder Adventure Path #3: Splintered Worlds © 2017, Paizo Inc.; Authors: Amanda Hamon Kunz, with Thurston Hillman, Jason Keeley, and Owen K.C. Stephens.