Essence of theMonstrous Avatar

You gain an ability to instantly and at will transform into a Monstrous Avatar form of your choosing, and back into your original one, which may optionally come with a transformation sequence or just happen in a blink of an eye.

This form is easily peak-human and can reach into post-human territory in some ways, a Werewolf might have regenerative healing and claws and teeth capable of rending through steel as well as monstrous strength and resilience for instance. These forms may also come with an optional weakness, which is in turn compensated by additional energy that can be directed towards granting them additional strength.

You may have a Monstrous Avatar form with an outright supernatural ability, such as a healing touch, or a fire elemental flying in the air and throwing balls of flame that explode like a grenade on impact, but it is likely to have at least some drawbacks depending on its strength, initially. Excessively powerful abilities, such as a Genie's ability to grant wishes, is likely to be out of your reach at least initially, but if you take on such a form, you may be able to grant some 'lesser wishes' by expending a slowly gained 'wish energy', but the most common drawback for this is being utterly incapable of granting your own wishes and only being able to grant wishes for others.

At the beginning, you have only 1 Avatar body to work with, but with some time and practice, you may unlock additional forms, and using them enough and spending time in a monstrous avatar form allows you to unlock new upgrades and additional strengths, as well as compensate for or eliminate any weaknesses a form might otherwise possess.

Any damage inflicted on a Monstrous Avatar form afflicts only it, no damage is transferred to your primary body, or other Monstrous Avatar forms you might possess. An avatar form heals rapidly when not in use, capable of recovering from even limbless near-death state in just 3 days time, and most injuries short of a limb-loss can recover in just 24 hours of wait.

In case of death of a Monstrous Avatar form, you will have to choose between appearing unhurt where your monstrous avatar form died, somewhere close by in a safe (for the moment), but random location, at the spot where you turned into your Monstrous Avatar form earlier at, or a previously designated 'safe spot' if you have one.

Establishing such a safe-spot requires you to spend at least 24 hours there within 1 week's time, which does not need to be continuous but within that 1 week window. You may only have 1 such 'safe spot' at a time.

Your Monstrous Avatars will come with some 'guiding instincts' which will make using a Monstrous Form and its abilities a lot easier, but practice is still advised before trying to use one in a more dangerous situation. These instincts may also help when you would potentially be overwhelmed by fear or surprise, and have you react instinctively to avoid a lethal blow, but doing this repeatedly makes it a bit less reliable, it is for emergency use, for actual Spider-Sense you would need to acquire a Form specifically possessing such an advantage.

Your Monstrous Avatar form may be a hideous Case53 monstrosity, a bizarre but cool looking monster, a sexy and dangerous looking monster man or monster woman, or anything else still fitting a loose Monster theme. No, humans can be monstrous to one another, but closest you might get to taking a separate 'human' form would be to become a Shapeshifter capable of copying a human's looks, potentially with its own drawbacks and problems to overcome first.

You may customize your Avatar's looks but after the initial customizing when gaining a new form, the Monstrous Avatar's changes require a 1 day cooldown while the form changes to its new looks.

As a curious side-effect, each time you return to your Primary form, your body is purged of any and all diseases, toxins, and other health related issues, in perfect health, and curiously enough there seems to be a mild telomere degradation countering effect in place. Rejuvenation effect may be achieved with intentional focus, but will require at least 1/10th of the time a body took to age to the point it has reached to counter, someone in their 40s would take 2 years to shed 20 years of aging and return to their 20s.

There is a mild confounding effect that makes it difficult to connect the Monstrous Avatar(s) to the Primary body and its identity, countering any scrying, divination, or tracking attempts, as well as either appearing as a blank spot or spoofing false information of your choosing to anyone with some extraordinary abilities to try and gain additional information out of others.

You gain the ability to travel to and from a pocket space housing a series of islands which may be wild and populated by delicious prey animals, or civilized hosting various facilities from a beach resort to a restaurant and apartment complex, or a nice comfy villa to stay at for a time. The pocket space is capable of slowly expanding and developing new sights, and you will always be able to jump into other islands you have already been to easily enough, but you may initially want to have a small dock at your starting island with a boat to take to the other islands, or an aquatic monstrous avatar form to make the swim across to other islands easier.

Any utilities and consumables are seemingly endless, things removed from shelves for consumption will be restocked again once the place is left unattended and not observed for at least an hour for a room-sized area, or half an hour for a closed fridge or a closet. Things like fresh water, waste water management, electricity, and other such things are handled. There is a good signal in the pocket space for devices, but they cannot reach outside the island without your express permission, and any such devices cannot be tracked back to the island, any such trace attempts ending up disappearing into the ether for even most talented agencies trying to locate you.

(Optionally) You will eventually gain the ability to travel the multiverse to various different worlds you may know from fiction or ones that are entirely new to you. This process is achieved by moving the pocket space itself closer to another world and jumping out of it to that world, but reaching that far will require at least 5 years of growth for the pocket space first, and additional practice to reliably reach a destination world of your choosing.

You may choose whether or not your Monstrous Avatar form is capable of 'spreading its curse' to others, such as in case of a Werewolf form. If you do decide to spread the effect to others, you may optionally include a few safeguards, such as a small push for loyalty towards you, or at least a specific inability to actually affect you with their own abilities in a harmful manner, unless you permit it, such as to conceal such a restriction if the are testing it lightly in preparation for a later betrayal. You may also enforce unbreakable loyalty from those 'converted', if you so choose. This can be set separately for different forms in different manner.