A Tiny amoeba would work for me.
Downscaling our
Giant Amoeba to Tiny would produce something like this:
Amoeba, Giant, Tiny
Tiny Ooze (Aquatic)
Hit Dice: 1/2d10+3 (5 hp)
Initiative: -5
Speed: 20 ft. (4 squares), climb 10 ft., swim 10 ft.
Armor Class: 8 (+2 size, -4 Dex), touch 8, flat-footed 8
Base Attack/Grapple: +0/-3
Attack: Tentacle -1 melee (1d2-3 plus 1d2 acid)
Full Attack: 2 tentacles -1 melee (1d2-3 plus 1d2 acid) [
Maybe only one tentacle or change the tentacle to slam?]
Space/Reach: 2 1/2 ft./0 ft.
Special Attacks: Acid, improved grab
Special Qualities: Amphibious, blind, blindsight 60 ft., ooze traits, translucent, vulnerability to fire
Saves: Fort +3, Ref -4, Will -4
Abilities: Str 4, Dex 3, Con 16, Int —, Wis 1, Cha 1
Skills: Climb +5, Swim +5
Feats: —
Environment: Any aquatic, forest, swamp, and underground
Organization: Solitary or mass (3–30)
Challenge Rating: 1/4 [?]
Treasure: None
Alignment: Always neutral
Advancement: —
Level Adjustment: —
Acid (Ex): A giant amoeba's acid does not harm metal or stone.
Improved Grab (Ex): To use this ability, a giant amoeba must hit with its tentacle attack. It can then attempt to start a grapple as a free action without provoking an attack of opportunity. If it wins the grapple check, it establishes a hold and deals damage automatically every round. Giant amoebas have a +8 racial bonus on grapple checks (already figured into the Base Attack/Grapple entry above).
Translucent (Ex): Amoebas are hard to see, even under ideal conditions, and it takes a DC 10 Spot check to notice one. Creatures who fail to notice a giant amoeba and walk into it automatically take acid damage. [
A Slime Mold wouldn't have Translucent]
Skills: Giant amoebas have a +8 racial bonus on Climb checks and can always choose to take 10 on Climb checks, even if rushed or threatened. Giant amoebas have a +8 racial bonus on any Swim check to perform some special action or avoid a hazard and can always take 10 on Swim checks, even if distracted or endangered.