Picture 6, Jades Son Emerald that she was carrying shortly before her death.
When Quan Chi tried to ressurect Jade from the dead his magic attached to the most vibrant life force, her unborn son Emerald.
Seizing the opportunity to raise and brainwash the offspring, Quan Chi taught Emerald his mothers ways using his Vessel, Ermac, who still carried Jade's soul. Sold to the service of Shinnok, Emerald was his right hand assassin.
Emerald grew up as a warrior of the Netherrealm. Working closely with Quan Chi and Shinnok he has mastered the power of reflection which causes him to reflect any projectile or attack. After a battle with the Thunder God Raiden, Emerald was enlightened to his true origins. He has taken on the bone staff in a show of respect (you will learn respect) of his mother and vows to punish Quan Chi and Shinnok for their treachory and avenge his Edenian Mother.