Phaseglaive

Weapon (glaive), Rare

The crescent blade and most of the haft of this glaive are spectral and translucent. Attack and damage rolls made with this weapon have a +1 bonus.

Beyond Sight. You can cast a modified version of the arcane eye spell. Casting it and moving the eye on your turn each cost a bonus action. The spell doesn't require concentration, and lasts for 30 seconds. You can cast it once, and regain the ability to do so on a long rest.

Ghostblade. You can attack creatures through nonmagical walls with this weapon. Creatures can't have cover against your attacks with the glaive, but you can't damage objects with it. You have disadvantage when attacking a creature you can't see, as usual.