>>528456135
Some sort of feathered serpent. The trace of night item talks about something greater than the nightlord behind its actions. The gate you step through in the day 3 transition is also a feathered serpent image.
Look up quetzecotl's lore on wikipedia or something. The god represented the dusk and dawn and the transition of night into day, which is the desire behind the characters with the night/day symbolism being used.