### Protean Changing
*Prerequisite: Changeling*
*You have uncovered one of the most carefully guarded and horrifying changeling secrets related to your abilities to Shapechange. Consuming the flesh or blood of other creatures allows you to replicate much more complex internal organs, changing your own internal structure and allowing you to have a limited capability to emulate their abilities in addition to their appearance.* You gain the following benefits and abilities:
**Specialized Replicative Shifting:** If you consume part of a creature (blood or flesh as an example) you can use your Shapechanging feature to replicate a single special physical feature of that creature (specialized sense, natural armor, movement method, prehensile tail, natural weapons, etc.) until the end of your next long rest. Your basic limb configuration must still remain the same (with the exception of a tail) when using your specialized replications. This ability can only replicate physiological features and specialized organs, magical abilities cannot be recreated.
* You may have a number of specialized features active equal to half your proficiency bonus.
* You may activate 1 of your memorized features and 1 consumed feature at the same time without suffering a penalty. Activating more than 1 consumed feature will cause you to take a point of exhaustion after holding the features for 8 hours or if you change one of the features.
**Shapechanging Feature Memorization:** Your body may develop a physical memory of a small number of features that you have extensively practiced manifesting. You may memorize a number of features equal to your proficiency bonus using the following method. A memorized feature can be used at will whenever you use your Shapechanging ability however you may only have a single feature active at a time. You do not need to consume part of a creature to activate a memorized feature.
* At the end of each long rest when you have consumed part of a creature and manifested a specific physiological feature you may roll a D100. Subtract the number of times you have manifested a specific physiological feature (number of in-game days you have manifested the feature) from 100 to reach the minimum target number to achieve memorization.
* D100 rolls can only be made during each time the party rests in-game (no rolling 30 times for a month of downtime though it will still count towards the feature memorization count and lower the threshold)
* If you wish to learn a new feature and are already at your maximum you will need to choose to forget an existing feature in order to begin training your body to recognize the new one.
* If at any point you choose to forget a specific feature memorization you will need to start over from scratch if you wish to memorize it again.
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