Creatures that See in Two Worlds (GEP)

__TOC__
Bashers walking along a planar shore on the Border often feel justifiably safe from the dangers just a transition away on the adjacent plane. But canny bloods realize that they'd best still be peery. See, some creatures possess attacks (petrification, death, and so forth) that extend onto the Border Ethereal. The creatures noted below are usually only encountered on the Border of the Prime Material Plane, but the potential certainly exists for inner-planar creatures with the same capability to affect the elemental Border. Naturally, if such creatures were somehow brought onto the Border Ethereal, they could affect the Prime or the Elemental Planes in the same way: The thought of an invisible, ethereal basilisk or medusa ought to strike fear into any adventurer's heart!
==Basilisk==
These reptilian monsters have eight legs, a sluggish metabolism, and glowing green eyes. It's their eyes that cause problems for adventurers; a basilisk's gaze turns fleshy creatures to stone. Worse, travelers on the Border Ethereal need to be just as wary as sods on the Prime, 'cause the basilisk's gaze penetrates the Ethereal veil. 'Course, if a body's turned to stone on the Border, no one on the Prime probably even realizes it.
Greater basilisks are meaner versions of their smaller cousins that possess a poisonous breath attack and a gaze attack effective to 50 feet. Dracolisks are the offspring of a confused black dragon and a greater basilisk, granting them the standard basilisk's gaze attack (20-foot range), plus the ability to spit a vicious stream of acid. Only beings on the Prime need worry about the physical attacks of these creatures. (MONSTROUS MANUAL. Also see that text for statistics on the greater basilisk and the dracolisk.)
BASILISK: AC 4; MV 6; HD 6+1; THAC0 15; #AT l; Dmg ldlO (bite); SA Gaze turns victims within 20' to stone (save vs. petrification to avoid); SZ M (7' long); ML steady (12); Int animal (l); AL N; XP 1,400
==Cockatrice==
This nightmare hybrid of lizard, cock, and bat is infamous for its ability to turn flesh to stone with its petrifying touch. A cockatrice is only an animal, but inexplicably, it can physically reach onto the Border from the Prime and affect Ethereal beings located there. This means that a cockatrice can actually see onto the Border as well, and thus it makes an excellent guard against Ethereal intrusion for prime wizards with the magic and/or patience to train one.
The pyrolisk is a variation of the cockatrice, virtually identical save for the single red feather in its tail and a reddish cast to its wings. 'Course, it's the gaze of the pyrolisk a basher on the Border Ethereal should worry about. (MONSTROUS MANUAL)
COCKATRICE: AC 6; MV 6, Fl 18 (C); HD 5; THAC0 15; #AT I; Dmg Id3 + special (peck); SA Touch of beak turns victims to stone; SZ S (3' tall); ML steady (12); Int animal (l); AL N; XP 650.
PYROLISK: AC 6; MV 6, Fl 18 (C); HD 6+2; THAC0 13; #AT I; Dmg 1d4 (peck); SA Gaze, fireworks; SD Immune to fire; SZ S (3' tall); ML steady (12); Int low (5); AL NE; XP 1,400.
SA-Gaze: Victims who meet the gaze of a pyrolisk must save vs. death magic or burst into flames, dying in agony. Those who save still suffer 1d12+ 1 points of damage. Fireworks: Once per round, a pyrolisk can cause any fire source within 30 yards to explode as a pyrotechnics spell.
==Medusa==
Given that most creatures and objects on the Prime can't affect a body on the Border, a canny adventurer might think that exploring the Prime while ethereal is the best way to investigate ancient ruins, dark caves, or abandoned buildings. But a body traveling the Border who sees a feminine presence in such places should be careful lest the object of his curiosity gaze back across the Ethereal boundary with cognizant and deadly eyes. Unlike basilisks or cockatrices, a medusa is an intelligent female humanoid whose petrifying gaze can penetrate the Border Ethereal. Its reddish eyes and the swarming hair of snakes that crown a medusa are the first clues, but these features are often noted only after a traveler has come closer than 30 feet. (From the Ethereal, a traveler usually needs to close to at least 12 feet to notice the living, twining hair!) Unfortunately, at that range the poor berk is subject to the medusa's deadly gaze. Ethereal victims need not worry about the poisonous bite of the snakes in a medusa's hair. 
Greater medusae have the lower torsos of serpents. They have the same gaze attack of medusae but are physically stronger and have more potent poison. (MONSTROUS MANuAL. Also see that text for greater medusa statistics.)
MEDUSA: AC 5; MV 9; HD 6; THAC0 15; #AT I; Dmg 1d4 + poison (snake bite); SA Gaze, poison; SZ M (6-7' tall); ML elite (13-14); Int very (11-12); AL LE; XP 2,000.
SA-Gaze: Victims within 30' who meet the gaze of a medusa must save vs. petrification or be transformed into lifeless stone. Poison: Creatures bitten by a medusa's snake hair must save vs. poison or die.
==Mordenkainen's Faithful Hound==
The 5th-level wizard spell Mordenkainen's faithful hound summons a phantom hound that only the caster can see. If conjured on the Prime Material, the faithful hound makes an excellent guardian, raising a great clamor of barking when intruders come near and delivering a vicious bite against any so foolish as to turn their backs on the creature! Sadly, Prime-bound berks can't return the attack, though they can refrain from turning away from the threat.
Those who encounter a faithful hound on the Border have a better chance of defending against it because a faithful hound is a creature of the Ethereal Plane, momentarily called into cohesion by the spell. When confronted on its own turf, the faithful hound can be attacked as a normal creature. Against Ethereal foes the hound attacks with abandon, forgoing its reluctance to attack corporeal intruders from the rear. 
Intruders on both the Border and the adjoining plane can disperse a faithful hound with dispel magic. If physically attacked on the Border, the faithful hound dissipates when its hit points reach 0. (Player's Handbook)
MORDENKAINEN'S FAITHFUL HOUND*: AC 0; MV 12; HD 10; hp 80; THAC0 11; IIAT 1; Dmg 3d6 (bite); SA Can attack creatures that require up to +3 weapons to hit; SD Detect invisible, astral, and ethereal creatures; SW Dispel magic disperses the creature; SZ M (7' long); ML fearless (20); Int animal (1); AL N; XP 3,000.
: * Hound statistics relevant only for Ethereal foes.