Dragoon

Take to the skies wielding a lance to fell the mightiest dragons. Dragoons wield mighty lances in medium armor, they fear no foe, for the Blood of the Dragon flows throw their veins.

Lance Mastery

Starting at level 3 when you pick this subclass, you now have a mastery with the lance. You no longer suffer disadvantage against creatures within 5 feet of you. You still must use two hands to use the weapon when unmounted.

Jump Attack

Starting at level 3; you add 10 feet when you jump and you can cast the jump spell once per long rest.

In addition you can declare that your are making a jump attack against a creature, make a weapon attack adding 1d6 points of piercing damage per 10 feet that you jump. You do not provoke opportunity attacks and you ignore fall damage equal to twice your strength score.

You can only jump attack once per turn and you cannot be wearing heavy armor.

Bonus Proficiency

Starting at level 3, you learn to read and write draconic and gain proficiency in the intimidation skill. 

Blood of the Dragon

Starting at level 7 The blood of the dragon courses though your veins. As a bonus action you can activate Blood of the Dragon, when you deal damage with your lance you can as a bonus action deliver an attack called Fang and Claw that deals 2d6 points of slashing damage, this attack is considered magical.

Blood of the dragon lasts for 1 minuet or until you fall unconscious. Blood of the dragon can be used a number of times equal to half your proficiency bonus rounded up. You regain all uses of Blood of the Dragon after you finish a long rest.

Geirskogul

Stating at level 10 while under the effect of Blood of the Dragon, as an action you can deliver an attack to all creatures in a straight line up to 20 feet. Creatures in the line must succeed on a dexterity saving throw or take 5d6 points of piercing damage, or half as much on a success. Your save DC for this attack is equal to 8+ your strength modifier+ your proficiency bonus.

In addition, your vertical jump increases to 15+ your strength modifier, and your horizontal jump increases to 40+ strength modifier and is no longer restricted to your move speed.

Dragons Sight

Starting at level 15 as an action you can open the Right Eye of the Dragon to add your strength modifier twice to your damage rolls and granting your resistance to either fire, cold, acid, lightning, poison or thunder damage. This effect lasts for 1 minuet or until you fall unconscious.

In addition when you use your action to open the dragons right eye, you can open the left eye of the dragon as a bonus action to grant one creature of your choice the same benefit within 30 feet of you. This feature can only be used once per long rest. 

Dragonfire Dive

Starting at level 18. The pinnacle of the Dragoon's bravery. When you use your jump attack you can choose either fire, cold, acid, lightning, thunder or poison damage for the attack.

In addition your vertical jump increases to 20+ your strength modifier and your horizontal jump increases to 60+ strength modifier, and you gain the ability to cast freedom of movement on your self once per long rest.