Ice biome

The Ice biome, also known as the Underground Tundra or Underground Snow biome, is a biome that is the underground version of the Snow biome, starting at the Cavern layer and stopping at the lava layer. On the Nintendo 3DS version, the Ice biome starts at the Underground layer. It is composed mainly of Snow Blocks and Ice Blocks. Thin Ice can be found generated over water and breaks when a character falls over 4 tiles onto it (unless using the Ice Skates or another accessory crafted from them). The Ice biome is the only place where Frozen Chests ((Old-gen console and 3DS versions) Ice Chests) can be found naturally.

In Hardmode, the Corruption, Crimson, and Hallow can spread through it, generating Purple, Red, and Pink Ice Blocks respectively. They are unable to spread through Snow Blocks.

On the Nintendo 3DS version, normal-sized worlds only have a 1/3 chance of containing a snow biome, and their respective underground. Furthermore, Armored Vikings, Snow Flinx, Icy Mermen, Ice Tortoises and Ice Mimics will spawn much more rarely than on the Desktop version, Console version, Old-gen console version, and Mobile version.

Notes

Most enemies in the Ice biome as well as in the Snow biome inflict the Chilled debuff, and more rarely the Frozen debuff.
An artificial snow biome can not be made using slush blocks.

Gallery

Backgrounds

This content is transcluded from Biome backgrounds § Ice biome (Underground).

Multiple thin layers of ice stacked on top of each other
Smooth wall of ice
Bumpy ice wall
Irregular ice layers stacked on top of each other

Ice biome (Cavern)

Ice crystals
Darker ice wall
Bumpy ice wall with extra ice rocks
Smooth wall littered with ice rocks

History

Desktop version

Desktop 1.4.0.1:
- Now generates further away from spawn point, and in a more narrow shape.
- Added Otherworldly Ice track from the cancelled Terraria: Otherworld.