Sulfur Deposits in the Nether

Basically, it would be small pockets of sulfur that a player could find in the nether (like a geode in the overworld but more often exposed), they would allow a magma sulfur cube to spawn which would basically be a magma cube that can explode or poison the player on attack. Maybe even have some sort of effect on the player in the small biome area?

Edit: or even have the cubes drop a more potent version of magma cream that could be used to craft a more powerful version of tnt

Edit 2: or even some sort of shore generation or scattered patches 

Edit 3: maybe even make fire geysers (an idea i found on Twitter by silentwosperer) part of the sulfur pocket things in the nether