Siebold's page

No problem!

Here are some other things that might fit your bill:
The Genius Guide to Hellfire (this has a really cool concept where you can cast the spells as [evil] to make them more powerful...but you're giving in to evil. Lots of potential there for good aligned characters :))

Actually, that's about it. It's not strictly Infernal-related. But y'know...close.

Ah, looks quite nice.

There is a Shaman class coming out...It's a Oracle/Witch smashup. Maybe that'll fit what you want a bit better? Make a dark pact with an infernal familiar and you get your powers...

Sounds pretty cool, I think the closest representation of what I'd like is the pactbound thaumaturg now.

i wouldn't say its a gap... they don't actually have any planar specific mysteries at all- the elemental mysteries obviously have some connection with their respective planes but they were intentional about distinguishing the mysteries from the raw element (wind instead of air, waves instead of water...), and the heavens mystery is about the night sky not 'Heaven' the plane.

that said, i did just remember that there's a planar oracle archetype you could check out.

Hm thank you.

There is also the rulership mystery in Wayfinder 5 or 6

I like the focus on Thassilon, thank you.

the outer rifts mystery is the closest fit i know of (and its an actual pathfinder option). combine it with the eldritch heritage feats for the infernal bloodline and it should work pretty well for you.

Thank you for the advice.

Oh, Thank you very much.
It looks quite nice.
I will use our creations as a template for future tinkering on mysteries (maybe).

When I leafed through Blood of Fiends I noticed the Legalist curse, which is a very nice and thematic choice in my opinion.

Now I have a problem of finding a fitting mystery that complements the Legalist curse.
Flame or Dark Tapestry springs to mind but those do have a quite different theme.

I wasn't able to find an infernal equivalent of the heavens mystery, but I might have missed something.
Is there a 3rd party mystery I could use as a reference or should I just take this to the homebrew section of this forum and/or tinker on it myself?

I read your former work and this is, again, very informative.
Thanks and keep up the good work.