Neil's celestial familiar can attack as a bonus action when she commands it, and she can use a bonus action to grant it flying or swimming speed, make its attacks magical, or allow it to deal extra damage.

Neil serves a Celestial patron. She adds the Celestial expanded spell list to the warlock spell list. She also knows Healing Light, allowing her to heal a creature she can see within 60 feet as a bonus action using a pool of 14d6, regained after a long rest. She can spend a number of dice equal to her Charisma modifier or fewer at a time.

Neil gains Radiant Soul. She has resistance to radiant damage. Once per turn when she deals radiant or fire damage, she can add her Charisma modifier to one damage roll. She can also use a bonus action to gain flying speed 30 feet for 1 minute, once per long rest.

Neil casts Eldritch Blast, making up to four ranged spell attacks, each dealing 1d10 plus 2 force damage. Her Repelling Blast invocation can push a target hit by the spell up to 10 feet away.

Neil releases a beam of sunlight in a 60-foot line. Creatures in the line make a Constitution saving throw, taking 6d8 radiant damage and becoming blinded on a failure, or half damage on a success. Concentration, up to 1 minute.

Neil can transport herself and willing creatures to another plane, or banish an unwilling creature to another plane with a melee spell attack.

Neil attacks the mind of one creature within range. On a failed Intelligence saving throw, the creature takes 4d6 psychic damage and loses the ability to cast spells, activate magic items, understand language, or communicate intelligibly. The effect can be ended by greater restoration, heal, or wish.

Neil can cast warlock spells using Charisma as her spellcasting ability. She has three 5th-level spell slots, which recharge after a short or long rest.

Neil learns eight eldritch invocations. Her invocations are Agonizing Blast, Armor of Shadows, Eldritch Mind, Eldritch Sight, Investment of the Chain Master, Mask of Many Faces, Repelling Blast, and Voice of the Chain Master.

Neil gains Pact of the Chain. She can cast Find Familiar as a ritual and gains a special familiar. Her chosen familiar is a celestial owl named Gleam.

Neil increases her Charisma score by 2, from 10 to 12.

Neil can cast one 6th-level spell from the warlock spell list once per long rest without using a spell slot. Her chosen arcanum is Sunbeam.

Neil increases her Charisma score by 2, from 12 to 14.

Neil gains Celestial Resilience. Whenever she finishes a short or long rest, she gains temporary hit points equal to her warlock level plus her Charisma modifier, and up to five creatures she chooses within 30 feet gain temporary hit points equal to half her warlock level plus her Charisma modifier.

Neil can cast one 7th-level spell from the warlock spell list once per long rest without using a spell slot. Her chosen arcanum is Plane Shift.

Neil can cast one 8th-level spell from the warlock spell list once per long rest without using a spell slot. Her chosen arcanum is Feeblemind.

Neil increases her Charisma score by 2, from 12 to 14.

When Neil is reduced to 0 hit points, she can make a radiant explosion before falling unconscious. Each hostile creature within 30 feet takes 2d8 radiant damage and is blinded until the end of Neil's next turn on a failed Constitution saving throw. Neil also regains hit points equal to half her hit point maximum. Once used, this feature cannot be used again until she finishes a long rest.

Neil has discovered a powerful and unsettling truth during her isolation in the mountains. She can identify celestial influence in dreams, omens, and fragments of religious texts, though she does not always understand what the signs mean.