permafrost biome

Added:

ice armor: which has a chance to negate all damage.

ice toolset: which have a chance to negate durability damage and the axe and sword have been an extra chance to do more damage.

ice monk: spawn in the biome to protect the ice temple.

ice altar and carved cryptic bone block: use ice shards and ice amulets respectively to summon the ice wisp, spawn in the ice temple.

ice wisp: new boss needs to be summoned in the ice temple and drops enchanted ice on death.

cryptic bone block: a new block filled with powerful magic that gives nightvision when standing on it.

ice shard: is dropped by the ice monk and is a new ranged weapon. is needed to make extra ice amulets and cryptic bone blocks.

enchanted ice: a new block filled with powerful magic that gives nightvision when standing on it. when broken without silk touch will drop ice crystals (recommended to use fortune 3).

ice crystal: an item dropped from enchanted ice that can be used to make ice tools and ice armor. can also be used to make extra ice shards and ice amulets.

ice pillar: new structure and are small pillars of ice temples(don't have loot). 

the ice temple: a big new structure with decent loot, traps, hostile mobs and the site to summon the ice wisp.

changes:

ice wizard has heavily been nerfed and lost their boss bar.

generation chances have been altered.

the structures now spawn with a base.