Currently my campaign is about to take another turn, involving the destruction of the current home of the PC's by a group of demon worshiping cultist. This creature is what I plan to use to make it happen. I'm not sure if I have the appropriate CR though.
Medium Outsider (Evil, Chaotic, Demon, Extraplaner)
CR: 6
HP: 68 (8d10+24)
Speed: 40, Fly 60, (average)
Initiative: +6
Str: 18
Dex: 15
Con: 16
Int: 14
Wis: 14
Cha: 17
Fort: 8 Ref: 4 Will: 7
AC: 19 =(10+2 dex +7 natural)
Base Att: +8
CMB: 12 CMD: 24
Full Attack:
2 Claws [+12] for 1d4+4,
1 Bite [+12] for 1d6+4
Special Attacks:
Reverberation (EX) -Standard Action: Deals 3d6 sonic damage to all creatures within 30 feet Fort save for 1/2. DC: 19 (1/2HD+10+Cha)
Maddening Chirp (SU) -Standard Action: As confusion spell centered on the Locust CL 8. Will save Dc: 17 (cha based) usable once per hour.
This is a Sonic, Enchantment (compulsion)[mind-affecting] effect.
Skills-
Acrobatics: 13 (8+2+3)
Bluff: 14 (8+3+3)
Fly: 13 (8+2+3)
Knowledge (planes): 13 (8+2+3)
Perception: 17 (8+2+3+4)
Sense Motive: 13 (8+2+3)
Stealth: 11 (8+2+3-2)
Survival: 13 (8+2+3)
+8 racial on acrobatics for jump
+ 4 racial on Perception
Feats-
Ability Focus: Reverberation
Power Attack
Improved Initiative
Blind-fight
Spell Like Abilities:
At will- Caster level 8
Cause Fear
Contagion
Desecrate
Detect Good
Detect Magic
Teleport (self + 50lbs only)
Telepathy
Once per day-
Summon (Entropic Locust, 50% chance) 3rd level
Special Abilities:
Darkvision 60 ft.
Immune to Sonic, Poison, Electricity
Resist- Acid, Cold, Fire 10
SR: 17 DR 10/cold iron or good
Consume Flesh:EX: As a full round action, an Entropic Locust may consume a corps of medium size. In doing so, the locust gains 5 temporary hit points that last for up to 1 hour. It may consume a corps greater than medium size, but it takes extra time, consuming the equivalence of medium size every round, and gaining 5 temporary hit points each round it spends eating. A locust may not gain more than 40 temporary hit points in this way.
Spawn: If the locust reaches 40 temporary hit points in this way, it will regurgitate the contents of it's stomach to become a larva losing all temporary hit points. Treat this larva as Entropic Locust in all respects, except it is helpless and does not gain the natural armor bonus. In 1d4 rounds, this larva will grow into a full grown Entropic Locust. with the normal stat block above.
The basic concept of the creature is a giant demonic insect that feeds on flesh and vomits up more of it's kind. It would also travel in packs of no less than 4. I was originally thinking crickets when I started making this creature, but demon crickets just don't sound threatening enough. Cicada's were my next choice, but I decided locust would be more fitting based on there habits.
I'm not completely sure on the temporary hit point limit for the consume flesh or spawn abilities but it's close enough to test.
First thing I did is compare your creature to the shadow demon. IMHO, I would say they end up being extremely similar in power, so I'd either nerf a few of the abilities a little, or just bump up the CR. I don't know what level your players are or how hogh/low powered you run them, but I would think a group of 4 level 6 adventerures would have a very difficult, althoug ultimately victorious, battle against 4 of your locusts.
The consume flesh ability is interesting, but it won't really make too much difference in combat unless the PC's are very outnumbered, since they won't have enough time to just eat and spawn. Most likely they'd start with the extra temp hp, or just creating spawn. From what I see, I'd say good creature idea, solid foundation and well thought out, but defintely a CR 7 in my book.
Thanks for the feed back Beorn. I'll be throwing them against 3 level 8's and a level 10 so I'm pretty sure they'll be able to handle 4 to 6 of them at a time a few times before they risk getting into trouble.
What I think I'm gonna do, is drop 12 to 20 of them in the center of town and have them part off in packs of 4 to 6 and go from there. (depending on how it looks the pc's can handle them.)
This will basically be an unscaled version of how the whole campaign started.
Pre-pathfinder, tons of zombies that gave you a disease and turned you into zombies. The entire town was afflicted and they literally killed off hundreds of zombies before they could escape by level 5. Only this time, I'll give them a chance to stop the damage before everyone is dead.
I'm really looking forward to it, but it will be a few more weeks before they get to that point.
Scary.