The dagger isn't literally a dragon scale, but it's shaped like one and its magic kicks in when your Dragon Magic snarls into force after you are bloodied.
|Lvl 3||+1||680 gp|| ||Lvl 18||+4||85,000 gp|
|Lvl 8||+2||3,400 gp|| ||Lvl 23||+5||425,000 gp|
|Lvl 13||+3||17,000 gp|| ||Lvl 28||+6||2,125,000 gp|
Enhancement Bonus: attack rolls and damage rolls
Critical: +1d6 damage per plus
When your dragon sorcerer Scales of the Dragon feature triggers, you also get a +1 item bonus to attack rolls with melee and close attacks using this dagger until the end of your next turn.
Published in Dragon Magazine 381, page(s) 42.