D&D Subclass Contest XX: Subsystems Online

[MoleMage]

It's time for our next subclass contest! Subclass Contest XX: Subsystems Online.

1. The class must fit the theme of the contest. For our twentieth contest, we are trying out a new theme for the first time: Homebrew Mechanics. Obviously all of what we do here is homebrew, so what this means specifically is your subclass should implement special homebrew mechanics, either developed elsewhere or original to this creation, that can be transferred and used by another class. Did you find a good homebrew alchemy system, and want to make yourself a ranger subclass based around it? Or maybe you think someone's spellcasting variant is really good and needs an Eldritch Knight of its own? Martial Traditions, variant magic, unique crafting mechanics, even turning combat into a minigame, as long as it's homebrew and it could be used elsewhere or already was, it's on theme.
2. Your class must be posted in this thread. If you wish, you can use external formatting, such as Google Docs or Homebrewery, though I recommend sharing it as a PDF to ensure that it works on most computers.
3. You may only create one subclass, which must follow the normal progression for the class it belongs to. Please specify what class it is for. You can use any base class published in official material (including the Unearthed Arcana posts), or any existing homebrew class (don't make a whole base class just for your submission). If you are going to use a homebrew base class, make sure you get permission from its original creator and post a link so we know where to find it! Failure to get permission will be grounds for disqualification. The rule about obtaining permission is especially important in this particular subclass contest, since entrants are expected to borrow from other homebrew. Obviously if you use your own homebrew, you are assumed to have given yourself permission.
4. Until the contest is finished, do not publicly post your subclass anywhere else, other than the discussion thread for these contests. If you are found to have done so, that subclass will be disqualified (though you will be allowed to post a new one if you wish, within reason). Privately sharing your work is acceptable.
5. Your subclass must be complete by the end of the day on January 17th January 31st, 2021 (Happy New Year all!). The next day, I will put up a voting thread. Any submissions or edits after that point will be considered invalid. A two-week extension will be implemented if at least three requests are made in the chat thread.
6. Have fun, be respectful.

Chat thread: https://forums.giantitp.com/showthre...ming-Frequency
Voting thread: To be created January 18th. February 1st