Ice pixies live in snowy biomes and can be found during both day and night. They throw ice at any player they see, and they move faster on ice and snow.
Only Fire
Nothing hurts an ice pixie unless you are holding a torch or flint and steel when you hit it. Anything hot nearby will burn it too. Like torches, fire, campfires, magma, and lava.
Drops
Snowballs, and sometimes ice will drop when one is killed. They may also drop a frost rod when a mod adds them, such as Assorted Staffs .