Elemental Composition in Dungeons & Dragons 5e

Elemental Composition

17th-Level Psion Feature

Starting at 17th level, you gain the High Science of Psychometabolism, elemental composition. This gives you the ability to transform yourself into any element. You can change your body into dense materials such as iron or obsidian, sand or earth, water, or even air. While you are in elemental form, you gain any natural immunities or vulnerabilities of that element. For example, a sword cut simply can't harm a watery or gaseous body, while iron bodies need not breathe-but they can be rusted. You retain your limbs and senses. Very dense bodies (stone or metal) raise your Armor Class to 18 and give you an effective Strength of 20. Amorphous bodies give you the ability to slither under doors and elongate limbs. Gaseous bodies allow you to drift with the winds. Normal weapons may be unable to harm some forms, but magical weapons (and monsters capable of striking creatures hit only by magical weapons) can always harm you, regardless of your form. You may change your form once per round using a bonus action. If you change your form a second time, you must use an action to do so. In addition to the combat abilities of the various forms, you can always move in the element your body is composed of. For example, by changing to sand you gain the ability to burrow through sand at your normal movement rate. Some elemental bodies may be excellent camouflage; It’s hard to see a character made out of nitrogen gas, for example. This ability last for up to 10 minutes or until you choose to put an end to it. Once you use this feature, you can’t use it again until you finish a long rest.

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