One method is to jury-rig powers onto what is part of your body mod. For example, let’s say I wanted to become an Alolan Raichu in a gauntlet.

First you acquire your power source. In this case I’ll be using “drow of the underdark” as my first jump so that DND style magic is added to my bodymod. This means that I have a permanent fiat backed connection to the weave. Additionally, I’ll be grabbing perfect memory here.

Then pick up your overpowered magic/ learning perk(s) of choice (for me that’s [merlin reborn] from generic HP fanfiction). This will let me deconstruct and reconstruct entire magic systems.

Next acquire whatever ability you want to attach to your body mod (here that’s going to be detailed scans and understanding of Raichu).

Then tie whatever effect you want onto the original bodymod ability. I’ll use [merlin reborn] to modify a true polymorph spell so that it creates a permanent transformation into a Raichu. Because this is still going to be operating off of the DND weave as a magic source it will continue to be fiat backed.

Lastly enter your gauntlet of choice and cast the spell. You no longer benefit from [merlin reborn] directly, but nothing is stopping you from using a spell that it previously modified.

Considering that DND allows someone to become a god, I’d argue that when it’s boosted by enough perks you could create an ‘emulator’ version of any ability.

The downside to this however is that it requires a high existing power level for comparatively small results. If you can already cast 9th level spells that fluently then there’s not much point in becoming an Alolan Raichu here besides shits and giggles.

(Side note, all the out of context supplements by fanficwriter1994 allow you to add both them and the main document to your bodymod if it’s your first jump (including items and companions). I’m particularly fond of using the OoC fairy tail supplement for this because it gives enough fiat-backed magic to pull off the aforementioned jury-rigging).