First of all, all of us on our server are loving your mod. It really adds to the bossfights that would otherwise be easy in end game.

We noticed a problem though: Progressive Bosses sees the pink wither from Botania (entity id is botania:pink_wither) as a normal wither and spawns minions around it. As the pink wither is supposed to be passive, I do no think this should be the case.

As a side note, if Tinker's Construct is used along with this bug/feature it makes for a great wither skull farm

Also Wither Minions will be an actual entity and will drop nothing.

Thanks for your kind words.

Also yes I totally forgot to re-add the pink wither to the blacklist. I'll do it ASAP.

As for the Tinkers' farm, I would love if that wasn't intended, but they don't take into account the loot table of the mob when using the Beheading (now renamed, i don't remember the new name) modifier. Would be really cool if you could open an issue on TiCon issue tracker mentioning that.

Thanks for the report.

About the Severing dropping wither skulls, I brought it up on the Tinker's discord. They argue it works as intended, as those minions are vanilla wither skeletons after all.

Yep, read through the conversation. I will fix the Pink Wither anyway.

Do Shulkers drop the shell when using the TiCon modifier?