Essentially, an extension to torch god%. You trigger the Torch God event, complete it, use Torch God's Favor, then place a torch in each of the biomes with unique torch types. Timing starts when a new world has been entered with a new character. Timing ends when the last torch is placed.
This does require starting hardmode as hallowed torches exist, and the Hallow doesn't appear pre-hardmode.
The only problem with this is that we already have Torch God%, and generally we don't like adding new categories that require you to do all the steps of an already-existing category. But if Torch God% didn't exist, then I think your idea would be great! :>
Good point, but there's butter dog dog wit da butter on him% for botw, which is basically great plateau% with a little extra.
So. I've done a couple of runs. The first one was captured in multiple recordings because of my small c drive. The second one was not finished. Apparently the seed I was using has a bad crimson. And, as it turns out, I don't need to destroy the alter to spawn the hallow, do I? I thought I did. I'm going to clean my c drive to help with lag (which is really high when I'm recording), see if I can find a better way of recording (cos the way I've been doing it shoves the recording in the top left corner, which I don't know how to fix), and do another run.