Learn English – Word meaning “having the power to both create and destroy something”

I'm looking for a single word, noun or adjective, that conveys the meaning "having the power to both create and destroy" something specific. For example:

The magician seemingly had < insert word here > over rabbits, able to pull them from thin air, and equally return them to nothingness

Or

The network administrator can both create and delete user accounts, they have < insert word here > over/on/with user accounts.

Some words that I've considered but don't quite fit are

• sovereignty (too specific to politics)
• potency (not quite right)
• omnipotence (implies non specific power)

To clear some things up in response to comments.

• the creation/destruction need not be physical.
• there's no wizardry involved. Regarding the magician, think stage performer not wizard
• the word should not be limited to power over a specific thing, e.g. sovereignty grants per to create and repeal laws, but not the power to create and destroy rabbits
• the word should be modifiable in combination with a subject to indicate a single thing or concept to which the power applies
• the word should not be too general, such as omnipotence meaning power over everything