Many of the late-game materials require the smeltery temperature to be over 1000 to get melted. Molten Blaze allows that, but it is very hideous to make. You have to get a living Blaze and melt it in a smeltery. To do this you have to lead the Blaze to your smeltery, which would most probably be in the overworld, which is in my opinion pretty hard, if not impossible

My solution is to make the player able to do the same thing using Blaze Rods or Blaze Powder.

Maybe instead of melting Blaze Rods or Powder make an item that is dropped from a Blaze but is a bit rarer than Rods that you can melt into Molten Blaze.

Minecraft: 1.16.5
Forge: 36.1.13
Mantle: 1.6.92
Tinkers Construct: 3.0.3.126

I made the research and I heavily belive there is no other way to get Molten Blaze.

Make a smeltery under a Blaze spawner.

Make a smeltery under a Blaze spawner.

You have to push them in, and it is still hard.

And the guy just closed the issue like nothing happened and said "Make a smeltery under a Blaze spawner.". Slow claps

I love this community.

Perhaps if you are having troubles you should come ask in the discord. Many people are doing it without troubles. Furthermore blaze rods or powder won't be added as it will be too easy.