Otherworldy Patron: Incubator

An Incubator offers a contract in which one may have any wish granted in exchange for obtaining magical powers and being tasked with fighting witches. Though it isn't specified until the contract is closed, magicae puellae ‒or magical girls‒ give up their souls to form their Soul Gems, the source of their magic. When a magical girl's Soul Gem is completely emptied out of its energy, or at least emptied out of its positive energy, the girl becomes a witch, the very thing she swore to fight against. Incubators have to keep the magical girl-witch cycle intact.

Incubator Expanded Spell List

Spell Level	Spells
1st	cure wounds, shield of faith
2nd	aid, darkvision
3rd	motivational speech, beacon of hope
4th	aura of life, aura of purity
5th	dawn, dispel evil and good
9th lvl Mystic Arcanum	wish *

 

Pact of the Soul Gem

Prerequisite: Incubator otherworldly patron

 If you die while you are not a witch and you are within 300 feet of your soul gem, you come back to life 24 hours later as if revived by the Revivify spell. After this happens once, your soul gem will have consumed a lot of energy and will be visibly damaged, not able to perform such a powerful act again. As a result of your soul being deprived of such an amount of energy, you have disadvantage on all Charisma saving throws after being brought back to life in this way.

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Eldritch Invocations

Augmented Power

Prerequisite: Incubator otherworldly patron

 If you spend your last spell slot gained through the Pact Magic feature while not a witch, you don’t turn into a witch.

Life Source

Prerequisite: 2nd level, Pact of the Soul Gem

 You can choose how to oppose death, using the energy of your body’s or your mind’s energy instead of that of your willpower. If you die and come back to life for your pact’s effect, you can immediately choose to have disadvantage on any other ability score that isn’t Charisma, or you can choose to not have disadvantage on any saving throw for this effect if you choose to have disadvantage on all ability checks instead.

Secret Identity

Prerequisite: 4th level, Incubator otherworldly patron.

 You don’t revert back to your normal form as a result of being unconscious.

Diplomat

Prerequisite: 5th level, Incubator otherworldly patron

 You have advantage on Charisma (Deception) checks you make against evil-aligned creatures.

Magica Practice

Prerequisite: 7th level, Incubator otherworldly patron

 You gain immunity to the damage type you chose for your Magica Form feature.

Distant Soul

Prerequisite: 9th level, Pact of the Soul Gem

 The maximum distance between you and your soul gem in order to have you come back to life goes up to 3 miles.

Conservation

Prerequisite: 11th level, Incubator otherworldly patron

 You can use the effect of your Body Mending feature as a bonus action instead of as an action.

All Is Not Lost

Prerequisite: 17th level, Pact of the Soul Gem

 If you die while you are a witch, you apply the rules as if you died while not being one. If you come back to life, you still come back to life as a witch.

Mentor Familiar

Prerequisite: Pact of the Chain

 Your familiar has an intelligence of 14 and proficiency in Arcana, Nature and Religion checks. It can also speak common, and one exotic language related to the type of patron.

Magica Weapon

Prerequisite: 12th level, Incubator otherworldly patron, Pact of the Blade, not having the Lifedrinker eldritch invocation

 When you hit a creature with your pact weapon, the creature takes extra damage equal to your Charisma modifier (minimum 1) of the type you chose for your Magica Form feature.

Credit for homebrew to Mathsya from the D&D Amino. This is a transcription of their homebrew for use on DnDBeyond.

Puella Magica

Starting at 1st level, you are deprived of your soul, and it is instilled into a soul gem, which acts as a spellcasting focus only for you. 

Also, whenever you spend your last spell slot gained through the Pact Magic feature while not a witch, if your soul gem gets destroyed, if your alignment becomes evil, or if you turn to the witches’ side, you turn into a witch. As a witch, your alignment is evil and can’t be changed to something else, and you don’t gain the benefits of your Magica Form feature. 

Also as a witch, any amount of healing you do via the spells you cast, your abilities, and your class features, becomes necrotic damage you deal instead. You can’t revert back from a witch to a puella magica by any means short of a Wish spell. 

If you die while you are a witch, your death is permanent, you can't be brought back to life, and your soul can't leave your soul gem (if still intact) and the Plane that it's in.

Magica Form

Also at 1st level, you gain the ability to transform into an alternate persona for up to 8 hours, gaining the following benefits:

• While in your normal form you do not have access to any of your warlock features. You cannot perform a long rest unless in your normal form.

• As an bonus action you can go from your normal form to your magica form, gaining full use of your warlock abilities, or back to your normal form. You also revert back to your normal form automatically if you are unconscious for 3 hours.

• Select one of the following damage types: acid, cold, fire, lightning, necrotic, radiant, or thunder damage. You gain resistance to the chosen damage type. Additionally, your Eldritch Blast cantrip and any spell and you cast which would deal one of those damage types instead deal damage of the selected type.

• When using your magica transformation you can choose to have all or part of your equipment merge into your new form and be replaced by an outfit that is decided upon the first use of the feature. You can also change the appearance of a weapon on your person, but it retains all its features. You can change the weapon you change the appearance of in this way once per long rest.

• While transformed, your appearance, voice, and the equipment that doesn't merge into your new form are magically disguised to protect your identity.

Body Mending

Starting at 6th level, whenever you cast a spell using your soul gem as a spellcasting focus you gain hit points equal to double the level of the spell slot you expended.

 Also once while you aren’t missing any hit points and you have your soul gem in one hand, you can use an action to regain a spell slot from your Pact Magic feature. You can’t use this feature again until you finish a long rest.

Fight Against Evil

Starting at 10th level, when you save someone from witches or evil in general (at your DM’s discretion) you gain the benefits of the Dedication effect of the Ceremony spell, and you can benefit from this effect more than once. 

Also you have advantage on Wisdom (Insight) checks to know if a creature is evil, and on Intelligence (Investigation) and Wisdom (Insight) checks made about or against evil-aligned creatures.

Rejuvenation

Starting at 14th level, you can perform long rests in your magica form too, and you don’t revert back to your normal form as a result of being unconscious for 3 hours. Additionally after you finish a short rest, you can choose to have any number of creatures within 10 feet of you gain hit points equal to 1d8 + your spell attack bonus, as bright light sheds from each creature healed in this way out to a range of 15 feet for 6 seconds.