https://manacube.com/threads/winter-keys-new-spawn-january-updates.11127/
The Winter Crate was released in January 2017 and featured Frozen Armor and a Frozen Pickaxe. It was available on Islands, Skyblock and Survival.
Freeze I [Armor]
IceForged II [Everything]
Experienced II [Pickaxes]
Telepathy I [Tools Only]
Mana Cube Dust [+100% Success Rate]
Frozen Armor
Protection IV Fire Protection IV
Unbreaking III
Respiration II
Aqua Infinity II
Frozen Pickaxe
Efficiency V Unbreaking III
Fortune III
SubZero Title 
/Itemfilter perk
Small Money Pouch [$20,000 to $60,000]
Medium Money Pouch [$50,000 to $150,000]
Large Money Pouch [$125,000 to $250,000]
Huge Money Pouch [$175,000 to $350,000]
Iron Golem Spawner
2x Treasure Key [Ancient]
Rank upgrade paper