Gauntlets of the Glacier wondrous, rare (requires attunement)

These bulky leather gloves are decorated with a white filigree and are chill to the touch. If you grapple a creature with both hands while you are wearing these gloves that creature takes 1d6 cold damage each turn until they are no longer grappled. If they break the grapple they must roll a Constitution saving throw equal to 8 + your proficiency bonus. On a failure they are Restrained by ice until the beginning of their next turn.

Spear of the Snow weapon, rare

This spear has an uncommonly large head with a blueish hue and an intricate etching of a winter landscape across it. When thrown it creates a billowing cloud of snowflakes in a 10 foot radius around where it strikes whether it hit its target or not. Any creatures within the radius are blinded until they leave the area or it dissipates. The cloud dissipates at the end of your next turn.

Once per short rest if you successfully hit a creature with the spear you can force that creature to make a Constitution saving throw equal to 12 + your proficiency modifer. On a failure they are restrained for 1 minute as ice freezes them in their tracks. They may repeat this saving throw at the end of each their turns.

Additionally, if driven into the ground as an action it freezes the ground and everything not held or worn...

Frozen Fang weapon, uncommon

This dagger has a blade of pure un-breaking ice on a hilt of cold steel. Its jagged edge is only further accentuated by the shards protruding from it. There are 6 large shards and on each successful attack one lodges itself within the target. For each shard stuck in the target it takes 1d4 cold damage at the start of its turn. The shards can be removed as action but they melt within 10 minutes once detached from the dagger and cannot be re-attached. All expended shards regenerate at dawn.

Permafrost Plate armor, very rare (requires attunement)

This pale armor is frigid to the touch, and even in the warmest weather has a thin layer of frost over it. The wearer must endure wearing the cold plate for an entire hour to attune to it. While wearing this armor you gain +1 to AC, you are resistant to cold damage, and are unaffected by temperatures as low as -50. A chilly draft follows you wherever you go. While you are conscious any creature hostile towards you that ends their turn within a 5-foot radius of you takes 1d10 cold damage.

Frostwall Guard armor, rare (requires attunement)

This angular shield is pure white with blue fractals emblazoned along its edges. It is said to be forged from the scales of a white dragon to defend an ancient dwarven city. Once per long rest, as an action, you can hold it aloft and speak its command word, forming a solid wall of crystalline ice as if the user cast Wall of Ice. Using the shield in this way does not require concentration.