And here they are with all buffing spells active.
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Sluuth Fiendish Advanced Black Pudding (with buffing spells)
Gargantuan Ooze
Hit Dice: 24d10+174 (426 hp)
Initiative: +0 (Dex)
Speed: 40 ft., climb 30 ft., air walk 40 ft., fly 90 ft.; freedom of movement
AC: 50% miss chance, AC 15 (-4 size, +0 Dex, +4 armor, +5 deflection)
Attacks: Slam +24 melee
Damage: Slam 2d8+17 and 3d6 acid
Face/Reach: 15 ft. by 35 ft./15 ft.
Special Attacks: Improved grab, acid, constrict (2d8+17 and 3d6 acid), smite good, transmit disease (cackle fever)
Special Qualities: DR 10/+3, SR 24, improved invisible, retributive strength damage, cold/fire DR 20,
spell immunity (see below), Blindsight 60’, split, ooze, nondetection, 50% miss chance,
Saves: Fort +19, Ref +13, Will +8 (+4 resistance already added in)
Abilities: Str 40, Dex 10, Con 33, Int --, Wis 1, Cha 1
Skills: Jump +45
Organization: Solitary
Challenge Rating: 16
Treasure: None
Alignment: Neutral Evil
Retributive strength damage: if a good creature succeeds at a melee attack against an unholy aura-warded creature, the offending attacker takes 1d6 points of temporary Strength damage (DC 23 Fortitude save negates).
Improved Grab (Ex): To use this ability, the black pudding must hit with its slam attack. If it gets a hold, it can constrict. Opposed grapple check: 1d20+44
Acid (Ex): The pudding secretes a digestive acid that dissolves organic material and metal quickly. Any melee hit deals acid damage. The pudding’s acidic touch deals 30 points of damage per round to wood or metal objects. The opponent’s armor and clothing dissolve and become useless immediately unless they succeed at Reflex saves (DC 28). The acid can dissolve stone, dealing 20 points of damage per round of contact. A metal or wooden weapon that strikes a black pudding also takes acid damage unless it succeeds at a Reflex save (DC 28). As always, objects take half damage from objects.
Constrict (Ex): A black pudding deals automatic slam and acid damage with a successful grapple check. The opponent’s clothing and armor suffer a -4 penalty to Reflex saves against the acid.
Split (Ex): Weapons deal no damage to a black pudding. Instead the creature splits into two identical puddings, each with half the original’s hit points (round down). A pudding with only 1 hit point cannot be further split. Splitting consumes a move-equivalent action.
Smite Good (Su): Once per day the creature can make a normal attack to deal additional damage equal to its HD total (maximum of +20) against a good foe.
Ooze: Immune to mind-influencing effects (charms, compulsions, phantasms, patterns, and morale effects), poison, sleep, paralysis, stunning, and polymorphing. Not subject to critical hits. Can not be flanked.
Buffing spells:
(1) endure elements, prot vs good, sanctuary, shield of faith (18 minutes); jump, mage armor,
(2) empowered x2 bull’s strength (+8), darkness, empowered x2 endurance (+10), resist elements, silence; blur (20% miss chance), cat’s grace, magic mouth, protection from arrows (DR 10/+4 for 170 minutes)
(3) Deeper darkness, prayer (luck – 18 rounds), protection vs elements (fire, sonic, cold; 216 points protected); displacement (17 rounds), fly (17 hours), haste, nondetection (DC 28 level check; 17 hours)
(4) Air walk (1700 rounds), freedom of movement (1700 rounds), spell immunity (1700 rounds – searing light, magic missile, fireball, ice storm); improved invisibility (170 rounds);
(8) Unholy aura (18 rounds)
Yellow spells are reflected in the stats. Green spells are backup. Red spells are NOT reflected in the stats, but are active and important nonetheless.
1. Pulsates with magic in the silent darkness. Victims are silently drawn inside where they can’t be seen. Smells like brimstone and alchemy.
2. Darkness dispelled? The thing drips smoking acid across the floor. Still invisible and silent, victims can’t be heard as the acid dissolves them.
3. Visible? It is pulsing blackish red, and imprints of ghouls keeps pressing out of ooze.
The big advantage here is surprise and fear; no one will know what it is, although it can dissolve and devour.