Tasha's Custom ASI...

• Darkvision. You can see in dim light within 60 feet of you as if it were bright light, and in darkness as if it were dim light. You can't discern color in darkness, only shades of gray.

Stole from Dragonborn...

• Draconic Ancestry. You are distantly related to a particular kind of dragon. Choose a type of dragon from the below list; this determines the damage and area of your breath weapon, and the type of resistance you gain.

• Breath Weapon. You can use your action to exhale destructive energy. It deals damage in an area according to your ancestry. When you use your breath weapon, all creatures in the area must make a saving throw, the type of which is determined by your ancestry. The DC of this saving throw is 8 + your Constitution modifier + your proficiency bonus. A creature takes 2d6 damage on a failed save, and half as much damage on a successful one. The damage increase to 3d6 at 6th level, 4d6 at 11th, and 5d6 at 16th level. After using your breath weapon, you cannot use it again until you complete a short or long rest. Instead, you may use your breath weapon a number of times equal to your Constitution modifier. You regain expended uses on a short or long rest.

Stole from Lizardfolk's Natural Armor racial trait...

You have tough, scaly skin. When you aren’t wearing armor, your base AC is 13 + your Dexterity modifier. You can use your natural armor to determine your AC if the armor you wear would leave you with a lower AC. A shield’s benefits apply as normal while you use your natural armor.

Stole from Aarakocra...

• Flight. Because of your wings, you have a flying speed equal to your walking speed. You can’t use this flying speed if you’re wearing medium or heavy armor.