Unless explicitly stated otherwise by the merchant, no visiting NPC merchant will do the following:
Offer items that provide mechanical benefits above and beyond what is normal for standard pieces of equipment. (Example: Fingerless gloves, light-soled shoes).
Offer items that are exclusively available to a certain guild. (Example: Crossbows, fingerless gloves)
Add "pockets" to existing non-container items, add "clasps" to non-closeable container items.
Make items lighter.
Change the base material of an item.
Remember, that these merchants are mostly here for you to have something unique appearance-wise, not to improve your meta-game.
There may be some merchants specializing in above services, such as adding pockets, clasps/latches, or weight reduction. However, said merchants will make it explicitly clear if they are providing such services before taking requests. No guild exclusive items/benefits will ever be offered to the general public.
Visiting (GM) Merchant Guidelines
Visiting (GM) Merchant Guidelines
[GMCHAT Uyoku]: Octum is when the octumbunny comes around and lays pumpkins everywhere right?
[GMCHAT Rias]: Dimmes says "oh hai :) u need healz? ill get u dont worry thaum lasers pew pew pew lol"
[CHAT - GameMaster Rias would totally nuke Rooks]: Here's how elemancy works: The freeblegreeble and the zippoflasm have to be combined with the correct ration of himbleplimp, then you add the gargenheimer and adjust the froopulon for the pattern you want, apply some tarratarrtarr, yibble the wantaban, and let 'er rip!
[GMCHAT Rias]: Dimmes says "oh hai :) u need healz? ill get u dont worry thaum lasers pew pew pew lol"
[CHAT - GameMaster Rias would totally nuke Rooks]: Here's how elemancy works: The freeblegreeble and the zippoflasm have to be combined with the correct ration of himbleplimp, then you add the gargenheimer and adjust the froopulon for the pattern you want, apply some tarratarrtarr, yibble the wantaban, and let 'er rip!