Way of the Gelid Fist

Various monastic traditions often employ the use of harsh environments and conditions to hone their bodies and minds into an elevated state of fortitude. You follow an order that resides in a frozen, desolate area where few are brave enough to tread. Using these nearly uninhabitable conditions to their advantage, your order specializes in not only surviving the bitter cold, but harnessing it and channeling its energy to project your Ki in new ways, manifesting it physically into solid ice, amplifying both your offensive and defensive capabilities.

Frigid Fend

Starting when you choose this tradition at 3rd level, when you are hit by a melee weapon attack you can use your reaction to attempt to parry the blow. When you do so, the damage you take from the attack is reduced by 1d10 + your Dexterity modifier + your monk level, leaving your target open for a follow-up strike.

As part of the same reaction, you can choose to spend 1 ki point to make an attack of opportunity against the target. If the damage of the attack was reduced to 0 by this ability, you do not need to spend a ki point to make the reactionary attack.

This feature cannot be used against critical hits.

Biting Blows

Starting when you choose this tradition at 3rd level, your mastery of the frozen elements allows you channel the bitter cold to enhance your combat prowess. When you use the Attack action on your turn, you can spend 1 ki point to imbue your unarmed attacks with frigid might. Your unarmed strikes deal an extra 1d6 cold damage. This effect expires once you have hit with a number of attacks equal to your proficiency bonus.

Sleetwalking

At 6th level, you've honed your ability to create ice, causing it to apparate beneath your feet to augment your movement. When you use Step of the Wind, your movement speed increases by an additional 10ft until the end of your turn. You leave behind a trail of sleet as you move, causing each space you pass through to become difficult terrain for 1 minute. While Step of the Wind is active, you can spend an additional ki point to cause shards of ice to erupt from the sleeted ground and shatter. Creatures within 5 feet of the sleeted ground (excluding yourself) take cold damage equal to your proficiency modifier plus your wisdom modifier.

Cryogenic Caress

Beginning at 6th level, you are capable of transferring the icy manifestation of your Ki into a preserving mist. Using this ability you can cast Gentle Repose at will.

Relentless Rime

Starting at 11th level, the damage of your Biting blows ability increases to 2d6 cold damage per attack. Additionally, if you attempt to use Stunning Strike on a target while Biting Blows is active, you can expend all remaining charges of Biting Blows to cause Stunning Strike to freeze the target in place, causing them to be paralyzed until the end of your next turn instead. This decision must be made before the creature targeted by Stunning Strike rolls their saving throw.

Your gain resistance to cold damage.

You ignore resistance to cold damage and treat cold immunity as if it were cold resistance.

Frozen Shell

Starting at 11th level, you’ve honed your skills in projecting your Ki into ice to the point where you can use this power defensively. By lowering the temperature of the air around you, you can form a layer of icy armor around your body. As an action, you can use 1 Ki point to cast Armor of Agathys on yourself without material or somatic components. You can spend 1 additional Ki point to cast the spell at a higher level per Ki point spent up to a maximum of 4.

Once you reach 13th level in this class, you can spend up to 5 Ki points to cast the spell at 5th level. At 17th level you can use 6 Ki points to cast it at 6th level. 

Volley of Verglas

Starting at 17th level, when you take the attack action, you can choose to replace 1 of those attacks with the following ability. Choose to expend a minimum of 3 ki points to unleash a rain of jagged ice shards that rain down upon targets you choose within a 40 ft cube. The shards deal 3d12 cold damage to the targeted creatures. You can spend additional ki points (up to of 6) to deal an additional 1d12 cold damage for each additional ki point spent.