Rust dragon, a type of dragon which breathes and makes melee rust attacks. It eats all types of metals. As with other metallic dragons, it is lawful.
New monster “aballin”, from D&D. It is a mobile j-class monster that can appear as a pool of water when not actively moving, and can possibly appear as a water elemental when moving. They can eat organic items like gelatinous cubes, though perhaps not instantly like gelatinous cubes, instead dissolving them some time after engulfing them. They are incapable of climbing stairs, and typically sit dormant imitating a pool until a monster draws near, at which point they become active.
A “lignivorous” flag that can be specified on a monster species. Lignivorous monsters can eat wooden objects and doors like metallivores can eat metal objects.
Cut down on the list of inediate monsters by defining some of them to be either herbivorous or carnivorous (note that the game uses carnivorous to mean “can eat meat” rather than “only eats meat”).
Herbivores:
Carnivores:
Ants (or locusts, if implemented) can eat food off the ground, and they create more of themselves when they do, proportional to the nutrition consumed. They can also eat food out of the inventory of something they are attacking, and if the target is carrying food in a bag, they can reach into the bag and either eat the food there or spill it out on the ground. Locusts that can’t find any food to eat could inflict illness with their bite instead. They could also eat grass terrain, if implemented (turning it into normal floor) and multiply that way.
Maybe, to avoid the problem of how unchecked gremlin multiplication creates a bunch of low-HP, one-shottable gremlins, locusts will increase their maximum HP by eating if their own maxHP is below some threshold. (Then they’ll split again by eating more after getting over the threshold.)
A monster flag that designates that its inventory is actually the contents of its stomach and is therefore not stealable, nor usable by the monster. Gelatinous cubes, rock moles, and purple worms should get this flag. (Also some other proposed “eater” monsters, like the bookworm.)
If a monster (like a purple worm) eats another monster, that monster’s inventory should be added into the eater’s stomach.
Ghouls eat rotten corpses they find on the ground.
Purple worms eat corpses in 1 turn, because they can eat the monster in 1 turn so why not the corpse?
Pets eat corpses incrementally, not all at once, and you can interrupt their eating by moving them off the corpse (e.g. swapping places). The corpse becomes progressively partly eaten as they eat it. Interrupting their eating deducts tameness points from them equal to how many they would have gained if they had been allowed to finish eating normally.
Make zruties eat every sort of food off the ground, including tainted corpses but not cockatrice corpses. Make them MZ_GIGANTIC and block line-of-sight. Give them a bull-rush attack that runs you over like a boulder trap but with more damage.
Gelatinous cubes specifically seek out scrolls labeled YUM YUM to eat.
