A frostrock filled biome that has a memorable creature, the Yeti, this biome spawns 3-5 groups of them that have 7-9 yeti. You are safe as long as they trust you, if they don't, you'll probably not be able to trade with them. The resources you can get from this biome are nitrogen, and yeti's club (if you're brave enough to try). The Yeti's Club is what these yeti carry around and use to attack, more info below.

Yeti

Yeti are an intelligent mob and a special one too, they have a "trust" system that controls how passive, neutral, or hostile they are to a specific target. If they seem safe, they trust them, if they have a little bit of weapons and armor, they get curious or suspicious of them, if they have full armor and weapons, they don't trust them well, and if you hurt them, they don't trust you at all. If they don't trust you, it's best that you take a step back or run if you don't have armor, but if you do have armor, prepare for a fight. But if you decide not to kill one, you can trade with Cryothite shards, gems, or blocks for various tools, armor, or resources. Yeti will also have different facial expression textures meaning they will be the only mob that truely shows their feelings. They also have a leader yeti that controls a yeti group, instead of using a club, they use a mace, they wear a crown that drops when killed. The arms don't have the dark lines on them because I forgot to add them, so I made the lore reason make it say that they clean their arms

the leader yeti
Instead of the other yeti going straight to killing you when you kill the leader, they pause with the "suprised" face texture for 2-4 seconds, and then start bowing to you like you're their new leader with the "neutral" face texture. as the leader, you can equip the yeti with armor, weapons, and even totem of undyings, and teleport them to your location whenever you want with the Cryothite Staff, but you can't teleport them if you're not in the Stone Cold. The lore reason they make you the new leader is they didn't expect you to be able to defeat their leader due to their power.

Yeti's Club

If you successfully kill a yeti or have enough Cryothite, you can obtain the Yeti's Club, the Yeti's Club is a special weapon that doesn't need enchantments due to its abilities. To swing, hold the hit button/key and release, the damage varies on how long you held it, To bash, crouch and then hit the same button/key, To Ice strike, press the interact button/key and a row of ice spikes that insta-kill your foes, luckily it has a 30 second cooldown so there is no spamming it.

Slicicle

A hostile mob that disguises itself as an icicle and waits until a player/mob comes by to kill it, they use their cryothite arms to slice or stab you, dealing the same damage as a diamond sword. they spawn in sculk remnants, ash canyons, and yeti domain, they're hostile towards pretty much anything that moves, except the warden (they run away from the warden if it's near). They can't be tamed at all and their lore is that they don't have any intellegence, their sole purpose is to kill and was given by the cryodra so it could kill all of the sculk in the dimension, but they ended up killing the cryodra because it wasn't specified for what they were meant to kill, which they killed the cryodra when they had the chance (the cryodra was starving).