Every surface of this brilliant room is decorated with images of blue dragons in attitudes of play and delight.
Wondrous Item 9,000 gp
Enhancement Bonus: Attack rolls and damage rolls
After you spend 24 hours meditating in the hall, the next time you spend an action point to make an attack before your next extended rest, you score critical hits with that attack on a roll of 19 or 20.
Published in Dragon Magazine 383, page(s) 46.