How about Ants that Explode?

 Autothysis 

 is the process by which an animal destroys itself 

via an internal rupturing or explosion of an organ

Wikipedia:

In at least nine Southeast Asian species of the Cylindricus complex, workers feature greatly enlarged mandibular glands that run the entire length of the ant's body. They can release their contents suicidally, rupturing the ant's body and spraying toxic substance from the head, which gives these species the common name "exploding ants."  The glue bursts out and entangles and immobilizes all nearby victims.  The soldiers of the neotropical termite family Serritermitidae, have a defense strategy which involves front gland autothysis, with the body rupturing between the head and abdomen. When outside the nest they try to run away from attackers, and only use autothysis when in the nest, to block tunnels up, preventing attackers entering.

1. ANT is to GIANT ANT as EXPLODING ANT is to EVERYBODY SAVE VS PARALYSIS
2. This would be a terrible Mutation for a PC to acquire...

Monster Monday 4

GNARLY EYE

Does anyone need another Beholder variation? Well, here's mine:

AC 1, HD (10), HP 70, Magic Eyes, At Will: Fly, Telekinese 100lbs, Telepathic Communication

Large Central Eye: Slow Spell, all within 90-degree cone, 60' terminus, no Save

Four Eye Stalks:
1. Magic Missile(s); 1d4 Missiles ea rnd, will target Spellcasters to ruin Spells
2. Hypnosis Ray; Save vs Mental Spell or be completely dominated until the gaze of this eye is broken, Stun for 1d4 rnds thereafter, will target most powerful/effective opponent
3. Vampiric Wounding Beam; causes 3d8 damage, Save vs Spells for 1/2, and adds these to HP, targets of opportunity, 1/rnd
4. Nullification Beam; renders targeted Magical/Technological items "non-magical"/inoperable for 1d4 turns, Save vs R/S/W Negates, will target most powerful/effective item used against it, 1/rnd

Happy Holiday... the Eye is Watching You!

Monster Monday 3,

This is possibly the most Lovecraftian thing I ever hope to see...
and I don't even dare to imagine it's
weird appetites and disturbingly Freudian motivations...

...but if anyone is sick enough to stat it up for me,
all I can promise is I'll use it in my game and let you know how it went

Monster Monday 2

ASHANE                     

Undead, always robed and hooded humanoids, faces obscured by Darkness and bearing a Rod topped with a crystal sphere containing a single Eye.  Spell use as Wizard, lvl 12 (Grand Ashane lvl 15).  Body is immune to non-magical damage, magic weapons do a Maximum of 6 HP/hit, although spells cause normal damage.  Mind resides in the Ashane’s staff, and it’s Spells are cast from this staff, Spells not cast upon the staff do not affect it directly, anyone touching the staff of an Ashane currently without a host body must Save or be Possessed, if this Save succeeds, the bearer of the staff can thereafter cast each the Spells currently memorized by the Ashane, but each time a Spell is cast, there is a % chance (Spell lvl x 10%) that the caster will be automatically Possessed (Make ‘em think they have some kind of “Archmagi” staff!)  Any Possessed will go into a coma until midnight the following night, when he reanimates as an Ashane, each following day the victim will be Drained of 1XP lvl, at 0 this can no longer be undone by any means.  Always encountered alone, although a Grand Ashane will always be accompanied by 1 or 2 Ashane apprentices.  Rarely ally with, employ, or otherwise interact with any others, are suspected worshipers of Azathoth.

(AC 4; HD 8-12, AT by Spell, or by Staff, +4, twice/rnd, MV 12")

Monster Monday ...a day late

ASTRAL ZOMBIE 
Undead resulting spontaneously from a fatal spaceship re-entry, or purposely created by Evil Wizards, faintly green-glowing.  Attack by Cold-Flaming Hands doing automatic 10 HP/rnd, which can be split among two opponents, ea doing 5 HP (no saves), or by Wail of the Void, 3x/day, once per 3 rnds, causes Save vs Mind-Affecting Spells or the agonized wail of the Astral Zombie echoes continually in the victim's head, rendering Spellcasting and any form of Mental or Vocal communication impossible, and disorientation resulting in -2 to AC and TH until the creature is destroyed.  May possibly possess advanced tech weaponry or gadget, often clothed in tattered, ruined spacesuits &/or bubble helmets with cracked visors.  Possibility to exhibit Mutation &/or Psionic ability.

(AC 1; HD 6-8; AT/DAM Spcl; SD 1/2 damage from blunt weapons, req. +1 weapon to hit; MV 15")