Scimitar of the Desert Winds

Weapon (scimitar), rare (requires attunement)

You gain a +1 bonus to attack and damage rolls made with this magic weapon. While holding or carrying this scimitar, you can tolerate temperatures as low as –50 degrees Fahrenheit or as high as 150 degrees Fahrenheit without any additional protection.

Wind Strike. When you hit a creature with the scimitar, you can use a bonus action to call upon the power of the desert winds. The target must succeed on a DC 15 Strength saving throw or be pushed up to 15 feet away from you in the direction of your choice and knocked prone. The scimitar can’t be used this way again until the next dawn.

NOTE: This is from the item catalogue, for the version from the setting book, see here