• touch OR
• jet of liquid +2 (numbness)
HD 2d8+1 (10 hp)
SP numbing, no mind
The translucent Tetrahedrons vary in size from 12 to 24 inches on a side.
They slowly roam whatever level surface they can access. Any living thing that touches the mass, either on it's own or by having the mass move into it, is affected by shooting numbness. The target must make a DC 15 Fort Save or have their Action Dice moved down the Chain by one step in a cumulative effect. This Save needs to be made for each round of contact or each repeated contact. The Tetrahedron's very short-ranged jet of liquid has the same effect. Anything that a Tetrahedron reduces to below a d3 on the Dice Chain they have completely paralyzed, and they will then proceed to glom onto the now-inert form and attempt to eat them (a slow process of days or even weeks).
Once away from the numbing influence, Action Dice move back up the Dice Chain one step at a time by making a new Save vs. a DC 10 once each Turn, with a success equaling one step back up.
Gelatinous Tetrahedrons are not a huge threat when encountered singly, but they have sometimes been deployed in small groups at either end of trapped hallways, for instance...
If ever six Tetrahedrons are together, they will skloodge into each other and form a Cube, which will grow in size as it consumes digestible matter.
[Unless you have other stats you'd like to use for a newly-formed Cube, consider it to be improved by 1d3+2 in almost all statistical respects above (Move 30, 1d20 Action Die), and that it's numbness power takes a target 1d3 steps down the Dice Chain with each successful attack.]
Move: 60 feet/turn
Hit Dice: 2 +1
Armor Class: 9
Treasure Type: nil
Reference the above for the monster's behavior. Save vs. Poison or be limited to acting every other round the first time, "feeble" minor actions only after a second failed Save, and not at all after the third failed Save. Each step of mobility returns after a successful Save made once per Turn.