A scepter was generally a rod or wand held in the hand of a king while administering the affairs of government. It was a badge of authority and a visible symbol of the power vested in the one who held it. With the scepter the king could bestow honor upon worthy subjects by touching them with it. By a simple gesture with it he could decree the death of those who had disgraced themselves or offended his dignity. It was an instrument of life and death.
Angels have no such power.
They may carry out the wishes of Him who wields the scepter, but may not impose their will in opposition to His will. The scepter of Jesus is one of absolute authority. Even the angels are subject to the power of Jesus. A superior anointing. Under the Old Covenant, the prophets, priests, and kings were anointed as a ceremony of induction into office.