You gain a (+1) bonus to attack and damage rolls made with this magic weapon.

The first time on each of your turns that you hit a creature with this weapon while you have fewer than half your hit points, you regain hit points equal to the weapon's damage die roll (1d12). This has no effect if the target is a construct, plant, or undead.

The axe can be used as a wooden stake for the purposes of paralyzing a vampire. A vampire reduced to 0 hit points by an attack made with this weapon is automatically destroyed.

While holding the weapon and not in sunlight, you can use a bonus action to teleport to an unoccupied space you can see within 30 feet. You can do so twice per combat. You reappear surrounded by bats until the start of your next turn; during this time, the space you occupy is heavily obscured to creatures trying to see through the swarm. If the sun is up, the bats immediately fly away and provide no obscuration.

The weapon has the thrown property, with a normal range of 20 feet and a long range of 60 feet. When thrown at a target within its normal range, it flies back to your hand immediately after the attack.

While the weapon is on your person, you have resistance to necrotic damage and advantage on saving throws against being charmed.

While in sunlight, the weapon loses the properties Swarm Step, Returning Throw, and Vampiric Resistance. Its (+1) bonus, Blood Reprieve, and Stake of the Night remain.