Aren't Blizz from Thaumcraft, which isn't in SF2? Well, if they are in SF2, you can spawn them by setting the biome to any that create snow during "rain" season. Leave piles of snow sitting around and Blizz can spawn on them.
Blizzes spawn on snow or snow blocks in COLD biomes like Taiga. Blizzes are from Thermal Expansion. On Skyfactory I had to be above level 130 somewhere to get snow to fall even though I set a chunk to Taiga.
