The Soul Sand Valley Condemned

Condemned are similar to zombies and inhabit the soulsand valley. They also attack the player at melee range, but when they die they will spread soul-fire to nearby blocks. These zombies are immune to soul fire, but not lava. 

The condemned could have a unique drop like a condemned core, or not. The main purpose of those mob would be to replace the skeleton as the main common mob of the soul sand valley. Meanwhile, a mob called the shambler could replace the skeletons as a more fitting and unique ranged threat in this biome, which I have also posted about.