Draconic nod

You conjure the power of the many dragons that live in the multiverse from the diabolical chromatic dragons to the noble metallic dragons. You call upon the dragons wrath to enrage a creature that you can see. You nod at a willing creature that you can see. For the next minute that creature gets 1 instance of a dragons legendary resistance ability. They can only use this ability within a minute of when the spell is cast. The creature also glimmers with spectral dragon scales relating to a certain dragon type (the casters choice). Whenever somebody hits with a melee attack for the duration of the spell the attack does 2d6 extra damage to a damage type depending on which type of dragon is chosen.