Going off my last feature request based on item tags, there should also be some sort of way to add in "OR" conditions. Right now, its based around "AND". If you are wanting to build a quest based around advancements, or locations, or entities based on a mod (Kill any mob from X mod to start questline), you are forced to build numerous quests and link them together via option link. this becomes rather tedious when there could be much simpler methods based around OR.

An example would be the screenshot above. If there was a way I can add OR advancements, I could select all the spell_books/ and if the player gets one of them they start the quest line.

I believe that this is a particularly complex feature to implement. Until it is properly supported by hqm, you can partially get around it by creating an advancement that combines conditions in the way you want. You can use OR conditions in advancements, right?

I am unsure if you can use OR statements in advancement. I haven't created a advancement before. But in this situation if.you could that would be nice for a temporary solution.