Twilight Tide

Weapon (dagger), very rare, requires attunement While holding this dagger, a small veil of darkness appears on your forehead. You gain a +1 bonus to attack and damage rolls made with this weapon. If you can cast spells, you gain a +1 to your spell attacks and spell save DC while attuned. You can also choose to activate the dagger as an action. While active, the dagger turns all bright light into dim light and all dim light into darkness in a 30-foot radius. The dagger can only be active for a maximum of 1 hour a day. This dagger has 6 charges. While the dagger is active and you are holding it, you can expend a number of charges to activate one of the following properties:

As an action, you can spend 1 charge to cast dispel magic

at its lowest level. If you are required to do a check, you have advantage if it is against any spell or magical effect that creates magical light. If you successfully dispel such magic, the weapon deals an additional 1d10 radiant damage on your next hit.

As a bonus action, you can spend 3 charges to vanish. You

can choose any point that is not in direct sunlight or bright light that you can see within 60 feet of you, teleporting to it. After appearing, you immediately turn invisible, until the start of your next turn.

Using your action you can spend 3 or 6 charges to create

roiling shadows around you. For each 3 points spent, you create one shadow monster within 5 feet of you. Roll initiative for it. It follows your commands (no action required), but acts on its own initiative. Whenever you use any of the dagger’s abilities, you take 1d6 hit points of necrotic damage, which cannot be reduced in any way. Curse. While attuned to this weapon, you have the nocthelian's Sunlight Sensitivity trait, meaning you have disadvantage on all attacks and Wisdom (Perception) checks while in direct sunlight.