Beast Otherworldly Patron

Your patron is a being connected with animals and nature. Unlike a Druid, however, the patrons that give powers to Warlocks are rarely kind in their servants. This powerful being demands more from you than favors, but your body. They can imbue your body with aspects of their power, transforming you into an aspect of their bestial powers.

Bestial Transformation

At level 1, your patron has granted you the ability to transform as a bonus action. You must concentrate on this transformation (as if concentrating on a spell), and it lasts for 1 minute, or until you lose concentration. You can transform 2 times. You regain all uses on a short rest. When you gain this feature, you choose two of the following aspects you gain when you transform.  

If you later gain the Pact of the Blade feature, you can make any attacks granted by this feature using your Charisma modifier rather than your Strength modifier.

Bite

Your mouth transforms into a bestial muzzle or great mandibles (your choice). This Bite attack counts as an Unarmed attack. It deals 1d8 piercing damage on a hit. Once on each of your turns when you damage a creature with this bite, you regain a number of hit points equal to your Charisma modifier, provided you have less than half your hit points when you hit.

Claws

Each of your hands transforms into a claw, which you can use as a weapon if it’s empty. It deals 1d6 slashing damage on a hit. Once on each of your turns when you attack with a claw using the Attack action, you can make one additional claw attack as part of the same action.

Climbing Claws

You can climb freely up walls, giving you a climbing speed equal to your Charisma score.

Digging Claws

You gain a digging speed equal to half your Charisma score, rounded up.

Hardened Shell

Your skin becomes tough as iron. Your AC is increased by 2.

Tail

You sprout a tail that you can use to knock enemies to the floor. You grow a long, lashing tail, which deals 1d8 bludgeoning damage on a hit and has the reach property. Once per turn, when you hit a creature with your tail, you can force that creature to make a Strength saving throw against your spell save DC. If they fail, they are knocked prone.

Webbed Limbs

You gain a webbing between your digits, giving you a swimming speed equal to your Charisma score.

Wings

You sprout wings in your back, allowing you to fly. You gain a flying speed equal to your Charisma score.

Bestial Brain

When you reach 6th level, your mind has been sharpened by your patron, allowing you to rely on animalistic instincts to maintain your mental composure. As a reaction, when you take damage and you are concentrating on a spell or your Bestial Transformation, you can give yourself advantage on a Constitution saving throw to maintain concentration. This must be done before the roll. You can do this a number of times equal to your Charisma modifier. You regain all uses after a long rest.

Double Concentration

Also starting at 6th level, you can concentrate a spell while concentrating on your Bestial Transformation. If you drop concentration, you drop concentration on both abilities, and you cannot use your Bestial Transformation again until you take a Long Rest.

Animalistic Fear

When you reach 10th level, you can channel your patron’s power through your attacks, potentially causing your opponents to have an overriding fear of you. Once per turn, when you hit a creature in your Bestial Transformation, you can expend a spell slot. If you do so, you deal an extra 1d8 necrotic damage, plus an additional 1d8 for every level your spell slot is above 1st level. In addition, the creature must make a Wisdom saving throw against your spell save DC. If they fail, they are Frightened of you until your Bestial Transformation ends. At the end of each of their turns, they can repeat this save, potentially ending the effect on them early. If a creature succeeds against this effect, they are immune to it for 24 hours.

Allied Transformation

Starting at level 14, your patron has given you the blessing of allowing you to transform your allies into beasts like you. When in your Bestial Transformation, you can expend a Warlock spell slot to touch a willing creature as an action. That creature gains one of your Bestial Transformation aspects (your choice) until your Bestial Transformation ends. They use your spell save DC and Charisma score for any aspects that call for it.