War Staff

Aundair developed the war staff to help wandslingers match the range of Thranish archers, but it quickly spread across Khorvaire. Any spellcaster who can use a staff as an arcane focus can attune to a war staff. While holding this staff in both hands, you can use it as an arcane focus. Any cantrip cast using it can be cast at up to four times the standard range. However, when you cast a cantrip at more than twice the standard range, your attack rolls have disadvantage, and other creatures have advantage on any saving throws made against your cantrip. So a fire bolt cast using a war staff has a range of 480 feet, but attack rolls against targets more than 240 feet away are made at disadvantage.

Versatile: This weapon can be used with one or two hands. A damage value in parentheses appears with the property—the damage when the weapon is used with two hands to make a melee attack.

Proficiency: simple, staff, quarterstaff Source: Exploring Eberron p. 222 (Third Party)