Sentry's wrath

The Sentry's wrath is a special crossbow that shoots out a slow moving bolt of lightning which shoots out arcing particle streams in random directions until it strikes something. Once it does, that bolt of lightning explodes.

It comes enchanted with Piercing VI and Mending, but also with a cooldown, indicated by an auditory clue. If you shoot before that sound, you will be electrocuted and badly hurt.

Obtaining
The Sentry's wrath can be found in a special room with a copper mechanism and captured Sentries which as a chance to be found in the Forbidden castle.

Possible upgrades
The Sentry's wrath enchanted with Quick charge and Unbreaking with books or other crossbows.

Downsides
The Sentry's wrath has no benefits if enchanted with Multishot and will lose 25 of durability upon attempting to use it without spectral arrows. Trying to grindstone it will create an explosion, damaging you and deleting the item.

Description
''Turns spectral arrows into a slow, powerful attack. Beware the cooldown.''