What.
This mod is intended for "expert" packs to gate blazing blood (or any other add-on equivalents) to the foundry/alloyer (access to Tier 4 materials) by restricting higher temperature fuels (>1000C) to scorched tanks and preventing them from being using in seared tanks.
Why?
The goal is to make the late game of Tinkers harder and encourage experimenting with lower tiers for longer.
Blazing blood is fairly easy to obtain and is pretty much the only road block to end game Tinker's materials. Aside from making the raw materials themselves harder to obtain, its not really possible to tweak to challenge of tier 4 materials without having to use other mods to make it more difficult or also nerfing access to the smeltery (access Tier 3 materials) too much.