The Ass: A Challenge.

[Arbitrarity]

I present... the THIGPWHCPDoL!

Also known as "The Thing". Feats and skills are not yet distributed. Incidentally, I'm not sure about how some of these templates interact. The real best trick is using Tauric template to stack templates, but that might violate the idea. It's just a giant donkey with an iron leg, a celestial demeanor, and wood-like skin, that can turn into a tentacle monster.

Titanic Half-Iron Golem Paragon Woodling Half-Celestial Pseudonatural Donkey Of Legend
Size/Type: Gargantuan Outsider (Fire, Extraplanar)
Hit Dice: 25d8+975 (1175 hp)
Initiative: +15
Speed: 180 ft. (36 squares, cannot run) 360 ft fly (good)
Armor Class: 80 (-4 size, +15 Dex, +35 natural +12 Insight, +12 Luck), touch 45, flat-footed 63
Base Attack/Grapple: +18/+74
Attack: Bite +89 melee (8d6+64)
Full Attack: Bite +89 melee (8d6+64) Slam +89 melee (4d6+42), 7 Tentacles +89 melee (2d8+44)
Space/Reach: 20 ft./ 15 ft.
Special Attacks: Trample (DC 58, 3d8+44), Horrific Gas, Breath Weapon (DC 63), Frightful Prescence (DC 33), Poison (DC 63, 1d6 Str/1d6 Str), Raging Blood, Spells, Daylight, Smite Evil, Improved Grab, Rotting Constriction, Constant Insight
Special Qualities: Low-light vision, scent, Magic Immunity, Construct Traits, Plant Traits, DR 25/magic, DR 15/Epic, DR 5/slashing, Rust Vulnerability,Spell-Like abilities, Fire resistance 10, Cold resistance 10, SR 125, Fast Healing 20, Vulnerability to fire, Haste, Immune to Acid and Electricity, Reflective Hide, Regrow Limbs, See in Darkness, Fire subtype, Darkvision 60 ft, Alternate form,
Saves: Fort +56, Ref +42, Will +56
Abilities: Str 99, Dex 41, Con 69, Int 20, Wis 42, Cha 24
Skills: Spot +54, Balance +57, Climb +72, Listen +54, Hide +41, Move Silently +53, Tumble +53, Use Rope +53, Use Magic Device +45, Spellcraft +42, Concentration +67, Forgery +43, Appraise +43
Feats: Endurance, Steadfast Determination, Power Attack, Multiattack, Improved Multiattack, Dodge, Mobility, Elusive Target, Improved Natural Attack (bite)
Alignment: Always Good (any)
Environment: Temperate deserts
Organization: Solitary
Challenge Rating: 48
Advancement: —
Level Adjustment: —

An enormous ass with a peg-leg and bark-like, reflective skin stands in front of you. Seven massive tentacles sprout from its back, and as you stare, it slowly turns around....

Spoiler

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Titanic, Half Golem, Paragon, woodling, Legendary Creature, Half-Celestial, Pseudonatural.

Improved Grab (Ex)
If the Titanic Half-Iron Golem Paragon Woodling Half-Celestial Pseudonatural Donkey Of Legend (THIGPWHCPDoL) hits an opponent smaller than it with a tentacle, it deals normal damage and attempts to start a grapple as a free action without provoking an attack of opportunity.

Rotting Constriction (Ex)
Once the THIGPWHCPDoL has hold of an opponent, each successful grapple check it makes during subsequent rounds permanently drains 2d4 points of Constitution. At the same time, the creature regains 10 lost hit points.

Alternate Form (Su)
At will, a THIGPWHCPDoL can take the form of a grotesque, tentacled mass (or another appropriately gruesome form), but all its abilities remain unchanged despite the alien appearance. Changing shape is a standard action. Other creatures receive a -1 morale penalty on their attack rolls against the THIGPWHCPDoL in this alternate form.

Constant Insight (Su)
The THIGPWHCPDoL makes all its attacks with a +15 insight bonus. The creature is not affected by the miss chance that applies to attacks against a concealed target.


At will—blur, dimension door, shield, unhallow, Daylight
3/day: Protection From Evil, Holy Aura, Greater Dispel Magic, Haste, See Invisibility, Speak with Plants
1/day, Bless, Aid, Detect Evil, Cure serious wounds, Neutralize poison Holy smite, Remove disease, Dispel evil, Holy word, Hallow, Mass charm monster,Summon monster IX (celestials only), Resurrection, Entangle, Summon Nature's Ally 2, 4, 6, 8, 9, Command Plants, Animate Plants, Control Plants

DC's hurt my head, as variable stat bases, and most CL's are 20.

Horrific Gas(Su) As a free action, the THIGPWHCPDoL can emit a cloud of poisonous gas from it behind in a 10 ft cone directly behind it. This cloud lasts one round, and the THIGPWHCPDoL can emit another cloud every 1d4+1 rounds. The initial damage is 1d4 points of constitution, and the secondary damage is death. A DC 43 Fortitude save negates both effects.

Smite Evil (Su)
Once per day a THIGPWHCPDoL can make a normal melee attack to deal extra damage equal to its HD (maximum of +20) against an evil foe.

Too many abilities...

Anyone who can help type in those abilities will be appreciated. Also, I should put in some sort of fluff.... hmmm...