Asides from the spells that got added with Rise of the Runelords, are there any other spells that were added to the game that are specifically meant to be sin magic based, and/or has anyone home brewed in their own additional Sin spells to the game. Im running RotR right now and I want one of my players who is playing a specialist to feel, well, special, so I thought in keeping with thematic I would give them access to spells only thassilonian specialists could cast, but the only sin spells i've found are from the RotR book itself, and they are general wizard spells anyway.
Nah fam. Sin Magic is a long lost form of magic that bit the dust along with ancient civilization, and really the only ones who know enough about it to use it are the rune lords themselves.