Soul Stone

Soul Stone is a block generating on the roof and in small pockets of the Soul Sand Valley. Like honey, standing on it won’t let you jump. Your movement speed is the same.

The texture would have handprints on it, so it makes sense that the blocks would stick to other blocks in redstone. They would not stick to other Soul Stone blocks.

Soul Stone blocks don’t interfere with a pistons push limit at all, so you could make bigger redstone contraptions, by lets say, replacing every other slime or honey with them.