Dear MikeLydeamore (MCF:Insaneau),
In the Witchery Mod, The coven witches is important for some rituals. But in skyblock, coven witches can't spawn naturally because they only appear in forest and village but most skyblock map have plain biome in every co-ordinates and avoid any structures. And hobogoblins can't spawn in the Overworld naturally due to the same reason. Although there is hobogoblins in the Spirit World, but I don't know how do them spawn and how to take mobs to the Overworld. So I suggest Ex Astris should have method to made these two kind of mobs.
On the other hand, in skyblock map, the Spirit World is also skyblock. So, there may have no whisper cotton because of space limit or prohibition of "decorations". And Ex Astris should have method to get the very fist whisper cottons.
Clayblockiller (the Github name just have a typo)

Can this be closed, or has the change not been released yet?

Hi there,

It's my understanding that most SkyBlock maps have every biome somewhere (this is certainly true if you're using Ex Nihilo to generate your void worlds). This should mean you can get Coven Witches and Hobgoblins by finding the right biome and building a suitable platform.

The Spirit World should not be a void dimension (at least not according to Ex Nihilo). I'd check this in the other mods you may have installed.

Hi there,

Some of skyblock maker don't know Ex Nihilo can generate void world, so they use special method to generate a super flat world without any layer of blocks to ensure "continent" won't appear.. And they don't change the default biome setting: plains everywhere. Additionally ,the Spirit World is determined by original overworld settings. Ex Nihilo won't made a void Sprit World but the method above will.
There is a lot of skyblock maps made by the method above, especially in China.
And I didn't install any other mods will affect world generation just now.

As someone who has made a skyblock modpack which has witchery I can tell you that hobgoblins WILL spawn in plains and forests. Coven witches are a problem though. My pack has normal generation in the spirit world, but not every pack will. If I had a choice I would throw a witch hand into a barrel of witch water to spawn a coven witch.