onEvent('worldgen.add', e => {
    e.addSpawn(blizz => {
        blizz.category = 'monster'
        blizz.entity = 'thermal:blizz'
        blizz.weight = 10
        blizz.minCount = 1
        blizz.maxCount = 4
        blizz.biomes.blacklist = false
        blizz.biomes.values = [
          '#icy',
          '#extreme_hills',
          '#taiga'
        ]
      })
    e.addSpawn(basalz => {
        basalz.category = 'monster'
        basalz.entity = 'thermal:basalz'
        basalz.weight = 10
        basalz.minCount = 1
        basalz.maxCount = 4
        basalz.biomes.blacklist = false
        basalz.biomes.values = [
          '#nether'
        ]
      })
    e.addSpawn(blitz => {
        blitz.category = 'monster'
        blitz.entity = 'thermal:blitz'
        blitz.weight = 10
        blitz.minCount = 1
        blitz.maxCount = 4
        blitz.biomes.blacklist = false
        blitz.biomes.values = [
          '#end'
        ]
      })
  })