A recent answer introduced me to Test of Spite. After reading their rules, I found the following section shocking:
- Iron Kingdoms material is allowed on a case by case basis.
- Dragon and Dungeon Magazine are banned.
- Serpent Kingdoms is approval-only material.
- Savage Species is approval-only material.
- Stronghold Builder's Guide is banned.
Do we know what caused them to ban the Stronghold Builder's Guide so completely? To my knowledge, Serpent Kingdoms and Savage Species are universally agreed to be hazardous for any DM to allow, so I'm amazed to see the Stronghold Builder's Guide listed as being banned even harder than they are.