Dungeon Butler

Core Concept:

The Dungeon Butler is a support, non-combat, magic-using class. The spell list is based around creating comfort and convenience for the other members of the party, and a DB is usually in the employ of a noble or royal party member. 

Combat Role:

Generally none, though a Dungeon Butler might equip a wand, rod, or staff as a general magic user, or use the normal weaponry of the rogue class. Crossbows are a popular choice. A DB might supplement their spellbook with Abjuration spells, or buffs to keep the party in nominal condition while fighting. While not healers, a DB ought to be handy with delivering magic potions as they are needed in an encounter.

Skills and Abilities:

Advances as an NPC class, combat skills follow general rogue progression on fighting, and a few rogue abilities that mimic the function of a proper servant, such as sneaking and hiding, sleight of hand, and the like. DBs aren't flankers, backstabbers, or conventional assassins.

Core Spell List:

Mend

Repair

Fabricate

Purify Food and Drink

Create Food and Drink

Leomund's Tiny Hut

Mordenkainen's Magnificent Mansion

Unseen Servant

Mage Hand

Cleanse

Origin:

The first Dungeon Butler was an unfortunate man named Gilford Sherwood. He was an outlander who the Numinous Road delivered to Cridhedun, where he ran afoul of the local gentry, caused a good deal of fuss, and ended up being bound and made a household servant to a noblewoman he had offended. He was tasked with learning spells she considered the most useless to dissuade him of the notion of being an outlander hero sent to save the world. As things happened, she was called to make a trip into a dungeon as part of her noble obligations, and she was not going to leave her favorite whipping boy behind. She had a retinue of Wightsilver Adventurers, and Guild of Adventurers-Upon-Return sycophants. After plumbing the dungeon and returning to the surface, the noblewoman was beyond surprised and pleased with her new Dungeon Butler.

When he wasn't serving her, she had him start teaching others how to be proper dungeon butlers. Just because a person is in a filthy stinking dungeon doesn't mean they have to camp like savages, not when their faithful steward can conjure a spectral mansion to lounge in, kitchens to set a banquet table, and then deliver a proper rub-down and foot massage before turning down the covers on the four-poster bed.

Equipment and Aesthetic

Chatelaine of the Majordomo - superior quality, can cast Mend and Cleanse at will, Heroe's Feast 1/day, Create Food and Drink 3/day, and Percy's Perfect Pavillion 1/day (halfway between the tiny hut and the magnificent mansion). a handsome wightsilver belt with its collection of 'keys' that act as focusing devices for the spells cast.

Obsidian Collar - good quality, +25% mana recovery and poison resistance, +3 charisma, immune to Silence status effect

Ocher Leather Boots - regular quality, +4 Endurance, -4 charisma (we dont want the help to be more charming than the master) -25% pain penalities

Uniform of a Butler - non-magical garment, and typically follows servant fashion and differs from house to house.

Weaknesses and Limitations:

There are plenty, minimal combat ability with melee weapons, cannot equip light, medium, or heavy armor, and spell list is based around providing comfort and convenience to others. Most nobles consider a DB who knows offensive spells to be gauche, the same for a DB who is multiclassed to equip armor or use melee weapons like swords, axes, or hammers. Crossbows are acceptable, no one is really sure why.

Party Synergy:

The presence of the Dungeon Butler and his spell list make long rests much easier, and the party's equipment and clothing stay in good condition. With the ability to conjure food and drink from essence means that the adventuring party isn't burdened by carrying rations, water containers, and other such sundry goods. As such, encumbrance is lower, morale is better, and no one is being worn down by poor sleep, hunger, or thirst.

The drawback is that the DB has to be protected during combat encounters, because if he is severely wounded or slain, the party doesn't just lose their comfort and convenience, they lose that access to a magic supply of food and drink. Can they retreat to the entrance before they are too weakened by hunger or thirst? Do they kill and try to eat monsters in the dungeon?