Hallowed Desert

The Hallowed Desert biome forms when Holy Water or Hallowed Seeds spread the Hallow to a desert. It replaces normal sand with Pearlsand, and normal cacti with blue-green cacti. The blue-green cacti is the same as normal cacti, just with different colors. Light Mummies will spawn in the Hallowed Desert if it contains enough Pearlsand, and will sometimes drop a Light Shard upon death. This biome can only form after you kill the Wall of Flesh and activated Hardmode.