CREATE EXTERNAL REFERENCE System Privilege

Required to create external references in the database.

This system privilege is required in addition to any other system privileges required for creating a database object that references an external object.

For example:

Grant this system privilege using the WITH ADMIN OPTION, WITH NO ADMIN OPTION, or WITH ADMIN ONLY OPTION clause. If you do not specify a clause, the WITH NO ADMIN OPTION clause is used by default.
Related reference
List All System Privileges