From HGWiki
This bestiary covers creatures common to all elemental planes. For individual planar bestiaries, visit:
Aoa

| Race: (unknown)
| SR:
| TR:
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AB:
| AC:
| Saves: F / R / W
| Conceal: (unknown)
| KB:
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Takes:
| Heals: (none)
| Deals:
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Misc Imm:
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Spell Imm:
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Special Abilities:
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Aoa resemble huge blobs of quicksilver that float above the surface of whatever environment they may be found. Their surface is like a mirror and reflects all light. Aoa are surrounded by tiny orbs that randomly separate from the sphere and reabsorb back into it.
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Ether Scarab

| Race: (unknown)
| SR: 57
| TR:
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AB: 106/101/96/91
| AC:
| Saves: F 41 / R 44 / W 41
| Conceal: (unknown)
| KB: (none)
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Takes:
| Heals: (none)
| Deals:
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Misc Imm:
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Spell Imm: Flesh to Stone
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Special Abilities:
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Ether scarabs are panicky natives to the Ethereal Plane. Their mandibles are sharp enough to cut holes through the planar fabric through which they can escape through when threatened. These holes are too small and close too quickly for other creatures to use for travel. When a ether scarab dies, however, it creates a longer lasting portal large enough for Medium creatures to pass through. They can therefore be a useful means of emergency egress from the Ethereal Plane.
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Ethereal Ooze

| Race: (unknown)
| SR:
| TR:
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AB: 108/103/98/93
| AC:
| Saves: F 47 / R 43 / W 45
| Conceal: (unknown)
| KB: (none)
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Takes:
| Heals: (none)
| Deals: MMa
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Misc Imm:
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Spell Imm:
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Special Abilities: Grapple check or be engulfed. (Unsure how to avoid or break free. Further information on the nature of this attack required.)
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These ethereal creatures are able to shift between the Ethereal plane and the Prime Material plane at will and thus can assume both an ethereal and physical form. Normally, an ethereal ooze will assume a cubic shape, much like a gelatinous cube. These oozes are flesh-colored and parts of those that they have previously consumed whirl within them
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Energons
Xac-Yel

| Race: (unknown)
| SR:
| TR:
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AB:
| AC:
| Saves: F / R / W
| Conceal: (unknown)
| KB:
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Takes:
| Heals: (none)
| Deals:
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Misc Imm:
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Spell Imm:
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Special Abilities:
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Xac-Yij

| Race: (unknown)
| SR:
| TR:
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AB:
| AC:
| Saves: F / R / W
| Conceal: (unknown)
| KB:
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Takes: EEl
| Heals: AAc
| Deals: AAc
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Misc Imm:
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Spell Imm:
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Special Abilities: inflicts vulnerability to AAc
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Xag-Az

| Race: (unknown)
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| TR:
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AB:
| AC:
| Saves: F / R / W
| Conceal: (unknown)
| KB:
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Takes:
| Heals: (none)
| Deals:
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Misc Imm:
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Spell Imm:
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Special Abilities:
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Xag-Ya

| Race: (unknown)
| SR:
| TR:
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AB:
| AC:
| Saves: F / R / W
| Conceal: (unknown)
| KB:
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Takes: NNe
| Heals: PPo
| Deals: PPo
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Misc Imm:
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Spell Imm:
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Special Abilities: inflicts vulnerability to PPo
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Xap-Yaup

| Race: (unknown)
| SR:
| TR:
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AB:
| AC:
| Saves: F / R / W
| Conceal: (unknown)
| KB:
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Takes:
| Heals: (none)
| Deals:
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Misc Imm:
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Spell Imm:
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Special Abilities:
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Xeg-Yi

| Race: (unknown)
| SR:
| TR:
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AB:
| AC:
| Saves: F / R / W
| Conceal: (unknown)
| KB:
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Takes: PPo
| Heals: NNe
| Deals: NNe
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Misc Imm:
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Spell Imm:
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Special Abilities: inflicts vulnerability to NNe
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Xel-Yan

| Race: (unknown)
| SR:
| TR:
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AB:
| AC:
| Saves: F / R / W
| Conceal: (unknown)
| KB:
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Takes:
| Heals: (none)
| Deals:
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Misc Imm:
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Spell Imm:
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Special Abilities:
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Xig-Yad

| Race: (unknown)
| SR:
| TR:
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AB:
| AC:
| Saves: F / R / W
| Conceal: (unknown)
| KB:
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Takes:
| Heals: (none)
| Deals:
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Misc Imm:
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Spell Imm:
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Special Abilities:
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Xod-Yar

| Race: (unknown)
| SR:
| TR:
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AB:
| AC:
| Saves: F / R / W
| Conceal: (unknown)
| KB:
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Takes:
| Heals: (none)
| Deals:
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Misc Imm:
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Spell Imm:
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Special Abilities:
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Xong-Yong

| Race: (unknown)
| SR:
| TR:
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AB:
| AC:
| Saves: F / R / W
| Conceal: 50
| KB:
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Takes: CCo
| Heals: SSo
| Deals:
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Misc Imm: Mind Spells
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Spell Imm: Disintegrate, Flesh to Stone,
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Special Abilities:
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Xor-Yost

| Race: (unknown)
| SR:
| TR:
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AB:
| AC:
| Saves: F / R / W
| Conceal: (unknown)
| KB:
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Takes: FFi
| Heals: CCo
| Deals: CCo
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Misc Imm: Mind Spells, Poison, Disease, Death Magic, Paralysis, Slow, Entangle, Ability Decrease, Movement Speed Decrease, Knockdown, Critical Hit
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Spell Imm:
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Special Abilities: inflicts vulnerability to CCo
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