Ancient Hellstone Brick

Shimmer turns ordinary Hellstone Brick into the look the block had before it was redrawn, which is the entire reason to make it. If you are building an underworld base and want the older, rougher texture, this is the only way to get it.

It still burns. Touching a placed one without an Obsidian Skull or an accessory built from one sets you on fire, so keep it out of floors you sprint across and use it for walls and trim. Carrying stacks of it does nothing, and enemies are immune, so it is useless as a trap.