Cold Iron Technique

Mastering the cold determination of iron you've enhanced your training in one handed melee weapons with elemental frost.

When you are wielding a melee weapon in one hand and no other weapons you gain the following benefits:

• When a creature within 5 feet of you makes an attack against a target other than you, you can use your reaction to make a melee weapon attack against the attacking creature.
• When a hostile creature's movement provokes an opportunity attack from you, you can use your reaction to cast a spell at the creature, rather than making an opportunity attack. The spell must have a casting time of 1 action and must target only that creature.
• You learn the Ray of Frost Cantrip and can cast it through your weapon (in place of one attack when using multi attack) replacing the damage of one attack per round with the spells damage instead. This feature can be used a number of times equal to your Proficiency Bonus per day (Minimum 1). Constitution is the spells’ spellcasting ability.

This feat cannot be taken alongside Hot Iron Technique