Moon Knight

The moon has been a symbol of truth and cycles throughout history. A Moon Knight is a warrior who has trained to draw power and act in accordance with the phases of the moon. Some celestials who call the moon their home grant power to those who act in accordance with the moon's cycles and light. 

Lunar Phase

When you choose this archetype at 3rd level, you temper your body and blade with the grace of the moon's light. Whenever you finish a long rest, you can choose what lunar phase you draw power from: Full Moon, New Moon, or Crescent Moon. While in this chosen phase, you can utilize a martial power as listed below;

• Full Moon. Your weapon attacks deal an additional 1d6 radiant damage. 
• New Moon. You can take the Dash action as a bonus action.
• Crescent Moon. After completing a long rest or adopting this phase you gain temporary hit points equal to your fighter level plus your Constitution modifier. 

Warrior of Silver Light

Also at 3rd level, you learn the moonbeam spell. When casting this spell, you use your Constitution modifier for the spell save DC. You can cast this spell once at 2nd level, after which you must wait until after a short or long rest to cast it again. 

Additionally, when you reach 0 hit points, the moon takes vengeance on the creature that felled you. Moonbeam is cast centered on that creature. The spell level of this casting is half your fighter level (minimum 2) and does not require concentration. Once this feature is activated it cannot be activated again until you finish a short or long rest. 

Moon Lore

Finally, at 3rd level, you learn some of the secrets of the moon. You gain proficiency in either Arcana, Nature, or Religion, and you learn the celestial language.

Arcana

You gain proficiency in Arcana

Nature

You gain proficiency in Nature.

Religion

You gain proficiency in Religion.

Waning Moon

At 7th level, as day turns to night and the moon shifts so can you shift your lunar phase. When you use your Second Wind feature you can shift your lunar phase.

Solstice

At 10th level, the long nights filled with blood and moonlight have forged you into a powerful lunar warrior. You gain additional benefits while in each lunar phase;

• Full Moon. You cannot be charmed or frightened
• New Moon. As a bonus action, you can turn invisible as per the rules of the invisibility spell.
• Crescent Moon. You have resistance to radiant and necrotic damage. 

Bridge of Light

At 15th level, the blessing of the moon's light lifts your soul and grants you boons while bathed in such light. While in bright light you have a fly speed of 60 ft.

Lunarian Envoy

At 18th level, as a high-ranking and powerful moon knight, you have the privilege of calling down an emissary of the moon to aid you. You can cast the conjure celestial spell at 7th level once per long rest and while a celestial you summoned is present you gain benefit from all lunar phases.