The Unicorn

Warlocks who make pacts with Unicorns serve as adoptive parents and caregivers of their patrons, and the Unicorns are frail yet powerful in radiant magic. Unicorn warlocks are sometimes confused with Celestial warlocks, which sometimes proved useful in keeping their unicorn patrons safe from potential harm.

Familiar Patron

Starting at level 1, you receive your companion and warlock patron; the unicorn. The Unicorn is your ally and source of power. Additionally, it is incredibly unique as Unicorns can vary widely. You can decide the colouration, name, and whether it is a mare or stallion. Your unicorn understands Common, yet wild unicorns speak a odd dialect. Domesticated Unicorns have more refined, customizable dialects of Common. If your unicorn should ever die, you cannot use your expanded spells until you find another unicorn to renew your pact with.

Pure Aura

At 6th level, your Unicorn's overwhelmingly good and pure aura is felt by all. Those within the aura of your Unicorn are trusting of you. Any non-evil hostile creature is considered neutral towards you, and any non-evil neutral creature is considered friendly to you as long as they are within 30 feet of your unicorn. This effect ends if you enter combat or otherwise harm the creature within the aura.

Transcendence

At 10th level, you witness your Unicorn's growth from being by your side. The unicorn becomes a medium sized mount. Your unicorn will also gain additional hitdice of 1d10 (6 + Con), and apply one applicable feat I.e. unicorns can't wield weapons.

Celestial Touch

At 14th level, the Unicorn's purity now runs through your veins. You can choose to make any of your Warlock Spells do radiant damage instead of its normal damage. You and your Unicorn also gain resistance to necrotic damage and you have become incorruptible.