Day Tecpatl (Stone Knife) is governed by Chalchihuihtotolin, the Jewelled Fowl, as its provider of tonalli (Shadow Soul) life energy. Tecpatl is a day of grave ordeals, a day of trials and tribulations. It is a good day to test one's character, a bad day to rest on one's past accomplishments or reputation. Tecpatl warns that the mind, the spirit, must be sharpened like the glass blade which cuts to the marrow of truth
Some people that were born on day Tecpatl and have their life energy provided by Chalchihuihtotolin are Ralph Fiennes, Tim Burton, Kevin Spacey, Courteney Cox, Lisa Kudrow, Gisele Bundchen, Shania Twain, Katie Holmes.