Domination

While attuned, the bearer can exert their will over dragons through sheer dominance. Once per long rest, you may declare Dominion for 1 minute: All dragons within 120 feet must make a DC 20 Charisma saving throw or fall under your control.

Dragons already hostile to you must make this save at disadvantage if they are of CR lower than your level.

Ancient or stronger dragons are immune to full control, but become hesitant, unable to use Legendary Actions during the first round of combat.