Skyswatter Halberd

Weapon (halberd), Rare, Requires attunement
The slim, aerodynamic head of this halberd slashes easily through the air. Attacks and damage rolls made with this weapon have a +1 bonus.
Anti-Air. When a creature enters or moves within your reach and it isn't your turn, and that creature is airborne (at least 5 ft off the ground and not attached to a surface, such as spider climbing), you can make an opportunity attack against that creature. Forced movement and falling can trigger this effect.