When you first open an ice box that generated cursed, it may spawn a gelatinous cube or a group of P monsters.

When attacking certain amorphous monsters (could be just puddings and gelatinous cubes, but also maybe jellies and other blobs) in melee, it is possible for your weapon to get stuck in the monster, yanking it out of your possession and putting it in the monster’s inventory. Unless, of course, the weapon is cursed.

A new type of pudding or slime (though possibly a j or b monster) that has a high speed and good attack and splits whenever it takes damage. Its entire strategy is based on surrounding you with lots of clones that all have the same high attack as the original. Has a high monster difficulty; possibly, their attack stats and difficulty should be high enough that they will usually not show up until Gehennom.

This is unintentionally quite similar to Brogue’s fearsome pink jelly.

When a pudding moves onto a square containing a glob of its own type, it absorbs the glob and gains HP.

If you are mostly surrounded by puddings, they will merge together all at once and engulf you. This is a delayed instadeath in several distinct stages:

1. The puddings tower over you and merge together, preventing escape. You are engulfed, but you can still do things like attack or zap a wand of opening.
2. One or two turns later, your arms and legs are grabbed. You can no longer use most items but may still be able to cast spells and read scrolls.
3. The pudding spreads over the rest of your body. You can’t speak or do things that require speaking, though prayer is still possible.
4. The pudding is forced down your throat, dissolving you from the inside. This either kills you instantly or gives you a few more turns to live if you have magical breathing.

A b-class monster which is a shapechanger and may transform into any P, b or j monster.

Slime terrain or puddles of slime, left behind when P-class monsters move around. It either deals damage or erodes footwear to stand in it.

Merge the P and b monster classes, on the grounds that puddings and blobs are both classes of amorphous monsters that are sparsely populated. (Some attempts have been made to also merge the j monster class in.)