Thermal Stones stay warm around the Crystaleyezer when the world temperature is lower than -20 degrees

Since Thermal Stones work based off of world temperature if the world is below the local temperature created by the Crystaleyezer the Thermal Stone will be warm due to being set to a temperature higher than the world temperature. Effectively making the freezing aura around the Crystaleyezer a safe space from most of Winter, so long as a thermal stone is in your inventory.