[details=Base Dragonborn]+2 Str, +1 Cha
Speed 30 feet
Draconic Ancestry. Choose a metallic or chromatic dragon. Your breath weapon and resistance are based on this type.
Breath Weapon. Once per short or long rest, use a breath weapon based on your draconic ancestry with a Constitution saving throw for half.
Damage Resistance. You gain resistance based on your draconic ancestry.[/details]

Darkvision 60 feet.
Better Breath Weapon. The Dragonborn’s breath weapon is incredibly weak as a racial ability. Damage is now 2d6=>4d6=>6d6=>8d6. This breath weapon can now be reused on a recharge of 6.

In D&D 5e, a recharge ability means that on your turn, you roll the corresponding die with regards to the recharge (in this case, a d6), and if you roll the appropriate number die, your ability is reusable again. A recharge could be 5-6, allowing use again on a roll of or 6.