Draconic Transmutation

Call of Tiamat. Whenever you first use the spell you gain a disembodied voice that whispers to you dark thoughts and Earth as you commit acts of greed, despite, and vanity. At DM discretion you need to make a wisdom saving throw or become self-serving and paranoid for the next 24 hours after using this spell. Likewise, when you utilize the spell, creatures when I make a DC 18 history check and if they pass it reveals that you have lineage to Tiamat herself. This may have a wide range of implications depending on DM discretion.

Chromatic Choice. When you cast this spell, choose one of the following dragon types: Black (acid), Blue (lightning), Green (poison), Red (fire), or White (cold). Your form shifts to match that of a young dragon of your chosen type. You remain in this form for one minute or until your concentration ends. This cantrip also has the following passive effects:

Size Change. When in dragon form, your size becomes Large.

Draconic Movement.  When in dragon form, your movement speed becomes 60ft. While in this form at 4th level or higher you gain it as a swim speed, and at 8th level or higher you gain it as a fly speed. 

Draconic Visage. Each non-draconic creature within 60 feet of the you that can see you must succeed on a Wisdom saving throw equal or be frightened for 1 minute. A frightened target can repeat the saving throw at the end of each of its turns, ending the frightened condition on itself on a success. If a target's saving throw is successful or the effect ends for it, the target is immune to your Draconic Visage for the next 24 hours.

Draconic Assault. While in dragon form, you forfeit proficiency in all weapons but gain the ability to make two attacks or one special attack: one with your bite and one with your claws; your special attacks are Draconic Devour and Draconic Breath Attack.

Bite. Melee Weapon Attack: +7 to hit, reach 10 ft., one target. Hit: (1d10+4) piercing damage plus (1d8) (damage determined by dragon type).

Claw. Melee Weapon Attack: +7 to hit, reach 5 ft., one target. Hit: (1d6+4) slashing damage

Once per turn you may choose one of the following special effects.

Draconic Metamorphosis. You may use a bonus action to change your dragon type.

Draconic Devour. You make an attack against a medium or smaller creature within 5 feet of you. That creature must make a dexterity saving throw against your spell save DC or the creature is consumed, and you regain hit points equal to your proficiency bonus. On a successful save or if the creature has more than 10 hit points, you may roll to make a bite attack with advantage instead.

Draconic Breath Attack. Each creature within a 15ft cone must make a dexterity saving throw against your spell save dc . A creature takes 2d6  (damage determined by dragon type) on a failed save, and half as much damage on a successful one. The damage increases to 3d6 at 6th level, 4d6 at 11th level, and 5d6 at 16th level. At the end of this attack you must make a DC 14 Constitution saving throw or take half the damage dealt with a 5% chance of taking full damage.