Draconic Bloodline Origin

See the PHB for Draconic Bloodline details

Origin Spells

You gain an origin spell at the noted Sorcerer levels. Once you gain an origin spell, you always know it and it doesn't count against the number of spells known.

If you have an origin spell that doesn't appear on the sorcerer spell list, the spell is nonetheless a sorcerer spell for you.

Whenever you gain a sorcerer level, you can replace one spell you gained from this feature with another spell of the same level. The new spell must be an enchantment or evocation spell from the sorcerer, warlock, or wizard spell list.