My DM and I are running a SOLO game for each other and it’s an OP PC game for us both. He recently gave me this feat:
Prometheus
This feat is sentient and acts as a companion to its user including the ability to take actions, it shares its initiative with its user but takes its turn immediately after, it can use use its action, bonus action, and reaction to use any of the following abilities:
•Synthesize: Prometheus can merge features it user has creating new more poweful features
•Separation: Prometheus can separate features its user has creating two different features
• Alteration: Prometheus can alter existing features its user has evolving them into stronger versions
•Symbiotic Control: the user can allow Prometheus to take control over there body, the user stays conscious and aware of there surroundings and can even still act as they wish
•Force Skill: Prometheus can use the features of its user causing them to activate without the user needing to use them, Prometheus has its own uses of said features and does not use up the user's uses of the features
Prometheus also possess features that do not require actions and that area always active
•Knowledge of the World: Prometheus acts as an encyclopedia to this world and can be asked questions
•Dual mind: Prometheus can hold concentration on spells for its user
All of these abilities are heavily reliant on the player and DM working together to decide the outcome.
And he also gave me…
Skill Share
As an action you my pick up to 3 willing creatures within 20ft, each creature chooses one feature (i.e. Race, Class, feat, etc.) they have access to, each other creature under the effects of this feat can now use that feature for the next minute. (The feature chosen must be the same one shared with the other creatures that don't originally have access to it) those effected by this feat can't be effected by it again while under its effects.
You may use this feat a number of times equal to your proficiency bonus, you regain all extended uses after a long rest.
What features (feats, skills, class abilities, etc) would make great fusions? Note that the fusions don’t have to be a pure fusion of the two and can just follow the theme of the two or more features.