Ice Waste is the coldest planet in the game. Without sufficient cold protection you will freeze to death in seconds. Beware the harsh winds and flying ice blocks, too. They'll rip you apart. No air will be found there so you will most certainly need an oxygen supply.
There also happens to be a DAMN LOT of Elder structures around, meaning extremely dangerous high-tier cultists.
Codex description
Ice wastes are absolutely terrifyingly cold. You do not want to go for a polar bear swim here, since you'd be flash frozen in seconds. Don't swim in the water. It's even colder. They do have some unique sorts of ice there, which provide something extra when extracting.
Extreme Cold (Resist: Ice) (immune at: 60% Ice)
