Bubble of Protection

A Bubble of Protection is a black pearl with powerful defensive enchantments. When activated, the user will be surrounded by an impenetrable bubble that defends them from harm both physical and magical. The bubble is suspended in space wherever it manifests and it cannot be moved by any means. Nothing can warp inside of the bubble and nothing inside can be warped out. While the user is more or less completely protected from harm in this bubble, they are also rendered incapable of harming anybody else. Even signals to activate spells or devices cannot be transmitted between sides of the bubble.
The Bubble itself is mostly clear with a slight white glass-like glow about it. Noise can still travel in and out of the bubble, but any magical properties it had will be negated and its volume will be reduced to a maximum of that of a calm indoor chat.
== Variants ==
Most variants are airtight and produce their own oxygen while others allow non harmful gasses to pass through, and the same is true for liquids, though most variants do not produce their own water. Most Bubbles of Protection can only last for a set duration of time before they need to recharge, however, ones with powerful enough pearls can generate more mana than they can spend and therefore can last indefinitely. Additionally, most Bubbles have a minimum duration that they must be active for before they can be deactivated.
Opaque
The Opaque Bubble variant renders the inside and outside incapable of seeing or hearing one another. Some variants of this have one way opacity. 
=== Prison ===
The Prison Bubble is a variant that traps a target other than the user and contains them within the bubble. The pearl must be kept close to the bubble or else it will dispel. Powerful variants can even create multiple bubbles at once.
Mobile
A Mobile Bubble can still move by falling and rolling around. This allows its user to travel like a hamster in a ball. However, the force of any impacts caused by the bubble colliding into anything will be negated, leaving both the inside and outside unharmed.
Preserving
A Preserving Bubble provides its user with all the nourishment they require for the time they spend in the bubble, sometimes slowing down their aging as well.
Stasis
A Stasis Bubble of protection places its inside in a stasis, leaving them completely unaffected by the passage of time
Warping
The Warping Bubble can still be transported via teleportation. 
Absolutely Safe
The Absolutely Safe Bubble of Protection is a cursed variant of the Preserving Bubble that can never be dispelled and prevents aging entirely, effectively keeping its victim trapped inside an eternal prison.