Ratri, Morning star of Kruphix

Kruphix tore off a part of nyx and fashioned it into his morning star when challenged by Purphoros. Kruphix only bestows Astra upon mortals who work to quell a power hungry god.

This divine weapon grants the wielder the traits of a nyxborn. You gain a +2 bonus to spell attacks and your spell save while holding this weapon.

Cloak of Stars. As an action, you wrap yourself in a starry cloak, appearing like a silhouette formed of the night sky. When you do, attack rolls have disadvantage against you. This cloak lasts for 1 minute, until you doff it off (free action), or until you die. This effect can only be used once per long rest.

Nyxborn Resistance. You have resistance to necrotic and radiant damage.

Blessing of the Horizon. If you are a worshiper of Kruphix, you gain all the following benefits for which you have the required piety:

Piety 10+. The morning star has 1 randomly determined minor beneficial property.

Piety 25+. The morning star has 1 randomly determined major beneficial property.

Piety 50+. The morning star has 1 randomly determined major beneficial property.

If you aren't a worshiper of Kruphix, the morning star has 1 randomly determined major detrimental property.

Knowledge Unbound. You must be attuned to a Horizon Focus and an Amulet of the Planes. When you hit with a spell attack or an attack using this weapon, you learn all of its damage vulnerabilities, damage resistances, damage immunities, and condition immunities. Additionally, you are immune to being charmed or frightened. This morning star has 5 charges. It regains all expended charges after a long rest.

Spells. While holding this morning star, you can use an action to expend 1 or more of its charges to cast one of the following spells from it, using your spell save DC and spell attack bonus: True Seeing (3 charges), Zone of Truth (1 charge), True Strike (1 charge), Silence (1 charge), Borrowed Knowledge, (1 charge), or Intellect Fortress (2 charges).