Batrush Glaive

Rare Glaive (Heavy, Reach, Two-handed)
Requires attunement

Damage. 1d10+1 Slashing
Dark Steel. You gain a +1 bonus to attack rolls you make with this weapon.
Batrush. You can use an action to transform into a magical swarm of bats and fly to an unoccupied space within 20ft. All creatures in a 5ft. wide line between your original position and your destination have to make a Dexterity saving throw (DC 15). On a failed save they take 1d10+1 Necrotic damage. At the end of this movement, you transform back into yourself and you regain an amount of hit points equal to half of the total damage you dealt. This movement does not provoke attacks of opportunity. You can use this feature twice per long rest.