necoc yaotl

Etymology
From.

Proper noun

 * 1) "The enemy on both sides"; an epithet of Tezcatlipoca.
 * 2) * 16C: Bernardino de Sahagún, Florentine Codex, Book 1
 * tetzalã, tenepantla motecaia: ipampa y, mjtoaia necoc iautl
 * (He brought discord among people, wherefore he was called "the enemy on both sides.")