S - Preservers

The Preservers a trio of Ancient Gith who have given their physical bodies, centuries ago, in order to chain their souls to an powerful artifact called the Index. Based on the complexity of the artifacts they use, they appear to possess extremely sophisticated building apparatus, consistent with a culture existing on an interstellar level. They also possessed a highly advanced form of cipher writing, apparently based on musical scales. Mohandar, a previous agent of the Preservers who died long ago, as well, stated that "They passed through the galaxy rescuing primitive cultures which were in danger of extinction by Zopheros and seeding them, so to speak, where they could live and grow." 
Mohandar had created a vessel so he could traverse the countless number of worlds, called "The Last Hope," which looked like a copper casket, with copper orb covered in strange glyphs hovering above it. The orb is called a Quadratic Key, and it allows for Telepathic communication with The Preservers, along with control of any other relics left by Mohander. When a being in control of the Quadratic Key desires, they command the casket and an entrance shimmers into being right beside it, glowing faintly 3 feet wide and 8 feet tall. The casket itself is a vault to put any OTHER extradimensional items you may have in, so you don't take them into The Last Hope. The owner and any creatures they designate when they open the ship can enter the extradimensional space as long as the portal remains open. The owner can open or close the portal if they are within 30 feet of it. While closed, the portal is invisible. Beyond the portal door is a utilitarian foyer with various chambers beyond. The atmosphere is clean, fresh, and warm. The owner can reconfigure any floor plan they like, but the space can’t exceed 15 cubes, each cube being 10 feet on each side. The Last Hope will configure any furnishing needed, in a comfortable and utilitarian style. It contains sufficient food to serve an adequate if boring meal for up to 20 people. A staff of 3 near-transparent servants attends those who enter, completely obedient to orders. Each servant can perform any task a normal human servant could perform, but they can’t attack or take any action that would directly harm another creature. Thus the servants can fetch things, clean, mend, fold clothes, light fires, serve food, pour wine, and so on. The servants can go anywhere in the ship but can’t leave it. Furnishings and other objects created by this ship dissipate into smoke if removed from it.