Continuing on with Dragon Magazine #91, we get the Sword of Night, originally by Stephen Martin. The only changes I made were updating the darkness to match the blinded condition (which I included in the description). I was going to match the fear effect to the frightened condition, but it has a lot of overlap with blinded, so I left it as is.
Sword of Night
Rare magic weapon
Though many magical swords shed light, a sword of night, also known as a black sword, sheds darkness. You determine the radius of the sphere of darkness given off by the sword; it can be from 5 feet to 25 feet, in 5-foot increments. Within this radius, all creatures but you have the blinded condition.
• A blinded creature can’t see and automatically fails any ability check that requires sight.
• Attack rolls against the creature have advantage, and the creature’s attack rolls have disadvantage.
You see normally in all respects, however, and can use the sword as a +1 weapon.
This sword can also cause fear in all creatures within the darkness who fail a Wisdom saving throw. This fear power is generated at your unspoken command, and may be produced up to three times per day. Creatures affected by the fear will move away from the darkness at full speed for 2-7 rounds.
A daylight spell negates both the darkness and fear powers.