Conduit

The Conduit CYOA series is a set of worlds within a single framework, wherein players become "conduits", or beings akin to planeswalkers, traveling between different worlds. Unlike planeswalkers, however, conduits weaken the barriers between worlds simply by existing (as they "conduct" the fundamental nature of one world into others) creating bridges between the world where things seep through, usually to the detriment of whatever's on either side. Conduits also gain power from their worlds, channeling the fundamental essence of the world into their own selves. The full CYOA is available here: http://imgur.com/a/nrqDn#0 and the creator takes the name Thrallherd when responding to discussion about it.

Spin-offs

The Conduit CYOA is also notable for its handful of spin-offs provided by third parties.

Waifu

The conduit waifu CYOA allows conduits to pick a least conduit as a mentor, subordinate, and social companion. It is largely recognized as canon because Thrallherd included an option in the main CYOA referencing it obliquely. It is possible to spend one point of essence at character creation to attract a "mature conduit", implicitly one from the waifu CYOA. However, some people have argued that it clashes with canon as it references a Pontifatrix passing away shortly prior to the ascent of the player. Since the main CYOA describes the player as being among the first of the new conduits, and the ancient conduits were dead for a very long time, the origin of this pontifatrix is questioned.

Queller

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The Queller CYOA pits the player as an antagonist to conduits. It stars the Shogun, a conduit with unusual powers not alluded to in the main CYOA. He grants the player a selection of powers designed to hunt and kill conduits, and the player will gain power from doing so.

It is thought that the Shogun's powers come in part from some virus-related world which the general community of conduits does not have access to. Many of the boons he grants his quellers are, however, are likely the result of considerable scientific research and development of materials and properties in more commonly accessible worlds.

Market

The market casts you as an ordinary person, who has been invited to an extra-planar shopping city. Presumably, this world is a dedicated bevin created by some meister for the sole purpose of shopping.