Xill CR 6
This flame-red humanoid appears to be a strange mix of insect and reptile, with four arms and twitching, fanged mandibles.
DEFENSE HP 75
EAC 19; KAC 21
Fort +8, Ref +10, Will +5; SR 17
Speed 40 ft.
Melee tactical dueling sword +16 (1d6+9 S) or bite +16 (1d4+9 P plus paralysis)
Multiattack 4 tactical dueling swords +10 (1d6+9 S), bite +10 (1d4+3 P plus paralysis)
Offensive Abilities implant, paralysis (DC 14)
As a standard action, a xill can lay 2d6 eggs in a helpless creature. A xill’s eggs hatch in 24 hours, at which point the young consume the host from within, inflicting 1 point of Con damage per hour per young until the host dies.
The young then emerge and planewalk to the Ethereal Plane, if possible, to mature. A remove disease spell (or similar effect) rids a victim of all implanted eggs or active young, or they can be cut out one at a time with DC 20 Medicine checks (each attempt takes 10 minutes). If a check fails, the healer can try again, but each attempt (successful or not) deals 1d4 points of damage to the patient.
A creature damaged by a xill’s bite must succeed on a DC 14 Fortitude save or be rooted to the spot, frozen and helpless, for 1d4 rounds. At the end of this time, the creature must succeed on a secondary Fortitude save, or be paralyzed for an additional 1d4 hours.
A xill can shift from the Ethereal Plane to the Material Plane as a move action. Shifting from the Material Plane to the Ethereal Plane takes 2 consecutive full actions, during which time the xill is immobile. As a xill fades away, it becomes harder to hit: opponents have a 20% miss chance in the first round and a 50% miss chance in the second. A xill can take a single willing or helpless creature along with it when it switches planes.
Environment any (Ethereal Plane)
Organization solitary, pair, or gang (3–6)
Xills are the scourge of the Ethereal Plane, conquering everything in their paths with only one purpose: to perpetuate their race at the expense of others. All xills are female and capable of fertilizing their own eggs, but require living hosts to incubate these eggs, which they inject into paralyzed victims by means of a grotesque ovipositor normally kept retracted behind their mandibles. Evil and alien, the plane-shifting xills possess impressive intelligence and a totalitarian, militaristic culture all their own. Though they see most other life forms as incubators, they particularly prize phase spiders for this purpose.
Alien Bestiary (Starfinder) © 2018, Legendary Games; Lead Designer: Jason Nelson. Authors: Anthony Adam, Kate Baker, John Bennet, Eytan Bernstein, Robert Brookes, Russ Brown, Duan Byrd, Jeff Dahl, Robyn Fields, Joel Flank, Matt Goodall, Robert J. Grady, Jim Groves, Steven T. Helt, Thurston Hillman, Tim Hitchcock, Nick Hite, Daniel Hunt, Mike Kimmel Marshall, Isabelle Lee, Jeff Lee, Lyz Liddell, Jason Nelson, Richard Pett, Tom Phillips, Alistair J. Rigg, Alex Riggs, Wendall Roy, Mike Shel, Neil Spicer, Todd Stewart, Russ Taylor, Rachel Ventura, Mike Welham, George Loki Williams, Scott Young.