Berserkify Dragon

You attempt to overwhelm the mind of a dragon that is CR 10 or lower you can see within range with otherworldly rage. It must make a Wisdom saving throw against your spell save DC, and does so with advantage if you or your companions are fighting it. If it fails the saving throw, it goes berserk until the duration of the spell ends. While berserk, on each of the dragon's turns, it must use its action to make an attack or use an ability that deals damage in some way (such as a breath weapon), has a +1 bonus to damage dealt by its attacks and damage dealing abilities when damaging things with an Armor Class. Additionally, the dragon cannot discern enemies from friends while berserk and attacks non-discrimatingly, with the targets of its attacks being random creatures within reach except the caster of the spell. When the spell ends, the dragon knows it was berserkified by you.

At Higher Levels. When you cast this spell using a spell slot of 7th level or higher, you can target one additional dragon for each slot level above 6th. The creatures must be within 50 feet of each other when you target them.