43d9043f_Biome___Official_Terraria_Wiki__Name
[Block Requirements] At least 100 Hallowed Grass, Pearlsand Blocks, Pearlstone Blocks, Pink Ice Blocks, or Hallowed Vines [Location] Any [Compatible Biomes] Not Forest, Meteorite, Corruption, or Crimson [Name] 
Hallow
Biome - Official Terraria Wiki