Jiyva

Slime for the Slime God!

Jiyva the Shapeless is the chaotic ancient deity of the slimes. Jiyva is notable for being the god with the fewest sentient followers, as well as the only god whom it is possible for players to kill. Since Jiyva is the amorphous god, its name is also shapeless and will be slightly different in each game: Jiyva Juub, Jiyva Jichodgh, Jiyva Jojaun...

Appreciates

• Allowing slimes to devour items.

Deprecates

• Attacking and killing slimes.
• Inactivity (loses about 1 Piety every 400 turns).

Given Abilities

Piety level -: "Jelly"

• All slime and eye monsters turn neutral. (Passive)
• Your consumables are shielded from destruction. This functions like conservation, but also protects your food, and has a success rate based on your piety (100% effective at full piety). (Passive)

Piety level *: "Squelcher"

• Request jelly: Summons a neutral jelly to devour items. (2 MP, 20-40 Food, 1-2 Piety)

Piety level **: "Dissolver"

• When your fellow slimes consume an item, you receive a piety/200 chance of increasing you satiation by 70 (a sultana). (Passive)

Piety level ***: "Putrid Slime"

• You are shielded from corrosive effects. This functions exactly like wearing an amulet of resist corrosion. (Passive)
• Paralyze Jelly: You can pray to temporarily halt all jellies from devouring items. (Piety)

Piety level ****: "Consuming [Species Name]"

• Slimify: Coats your weapon with slime for a few turns, which turns enemies into slimes. This only works against monsters with undead or natural holiness. (4 MP, 100-200 Food, 8-12 Piety)
• When your fellow slimes consume an item, you receive a piety/200 chance of recovering some MP. The amount depends on the price of the item. (Passive)

Piety level *****: "Archjelly"

• Cure Bad Mutations: Removes a randomly selected bad mutation. (8 MP, 200-400 Food, 15-23 Piety)
• When your fellow slimes consume an item, you receive a piety/200 chance of recovering some HP. The amount depends on the price of the item. (Passive)

Piety level ******: "Royal Jelly"

• Hits that take 25% or more of your maximum HP will generate friendly, high-end jellies, similar to the effect of the royal jelly. Symbol of Torment doesn't count. (Passive)
• Unlock the Slime Pits vaults: The walls that block access to the slimy rune and other goodies will be removed. (Passive)

In addition, Jiyva will do the following:

• Gain random mutations: Jiyva gives mutations as gifts, including rare mutations unique to Jiyva. This occurs only if you can safely mutate: mummies, ghouls, vampires below satiated, or lich form characters are not eligible.
• Stat shuffling: Your stats are modified depending on your skills, the weight of your inventory, and the encumbrance rating of your body armour. The sum of all your stats does not change.

Punishments

Immediate: All slimes abandon you and turn hostile. You'll also receive a few "bad" mutations.

• 1 "bad" mutation (these mutations bypass all forms of mutation resistance except for Zin's protection)
• Floods you with mutagenic radiation, and may transform you into a bat, spider, or statue, locking you in that transformation until enough time has passed.
• Summons hostile high level slimes, eyeballs, and spores.

Strategy

• Jiyva is most useful for a high level, late game player character. Low level PCs will gain little benefit from Jiyva, hence his placement far from the Ecumenical Temple. High level PCs tend to acquire two things; lots of bad mutations, and lots of junk laying around the dungeon. It is easy for someone who has already cleared the main dungeon to rapidly max out his piety score and remove all negative mutations, while retaining any positive ones and gaining plenty of new ones.
• Although you can (and will) freely mutate and filter out the bad ones with the appropriate invocation, don't expect to become a superhero. Jiyva will change your mutations unpredictably, and you may get horns, antennae, a beak, claws, talons, or hooves which may restrict your choice of armor. If you're a race who ignores most equipment slots (eg ogre, troll, felid, octopode), these are very welcome.
• Your stash will be put at risk by Jiyva's slimes, but there are ways to safeguard it. Putting your entire cache of items on an up-staircase, and being extremely quick to grab what you need will maximize the chance that Jiyva won't have time to spawn a slime on that level. Even better, so long as you have stasis, you can put your stash on a teleport trap and it'll be untouchable. However, Jiyva will randomly eat items throughout the Dungeon, so the only way to keep something completely safe is to carry it with you.
• Jiyva's stat shuffling means that classes with particularly horrid starting stats, such as transmuters, will gain more benefit than wizards.
• Note that gods are dependent on their worshipers' belief in them to continue existing. Jiyva's only intelligent and reliable worshiper is the royal jelly. If you kill the royal jelly and you're not a worshiper, then Jiyva will cease to exist. His wrath does not end though!
• It is highly recommended that you not switch to Jiyva until the Slime Pits, even if you locate an altar early on (which is possible). The slimes Jiyva floods levels with are much stronger than most early monsters and will kill most of the enemies on the level (not to mention consume all the items). While this sounds fairly useful, the slimes are simply neutral to you. They aren't allies, so you don't receive any experience for their kills. This leads to you being seriously under powered and under equipped by the later levels when the slimes simply don't have the power to keep you protected anymore.
• Be forewarned that eye monsters summoned by Mnoleg or Pan lords will be hostile. Jiyva won't be offended if you kill them. Shapeshifters transformed into slime or eye monsters are also safe to kill.

Guides

• Buddy23Lee's Troll monk of Jiyva ("slime troll") guide (0.12)