This Very Rare magical device is a Wonderous Item which allows its user to create a protective sheath around the target creature that emulates its native planar environment. The sheath appears as a glowing translucent bubble. The bubble provides all the basic needs the target requires while on a different Plane of Existence. For example, the bubble would provide food, water, air, shelter, and protection from heat while within the Elemental Plane of Fire. The sheath is a 10-ft.-radius emanation from the touched target creature. The bubble lasts for 2 hours.
This device requires attunement to use as described in the section “Magic Items” in the 5th edition Dungeon Master’s Guide.
“Attuning to an item requires a creature to spend a short rest focused on only that item while being in physical contact with it (this can’t be the same short rest used to learn the item’s properties). This focus can take the form of weapon practice (for a weapon), meditation (for a wondrous item), or some other appropriate activity. If the short rest is interrupted, the attunement attempt fails. Otherwise, at the end of the short rest, the creature gains an intuitive understanding of how to activate any magical properties of the item, including any necessary command words.”