I’m unfamiliar with the part of the constitution that says a president can appoint a supreme court justice without the advice and consent of the Senate if they happen to be on recess.
Article 2, section 2
Not clear to me if that would be temporary or permanent.
Eisenhower appointed Earl Warren using a recess appointment after the death of a Supreme Court justice.
Article II, Section 2, Clause 3.
It would only last until the end of Congress’s session, but a lot of damage could be done in that time.