Halo Wars Easter Egg - Age of Mythology Reference

One of the hidden skulls you can find in Halo Wars is called the "Wuv Woo" skull and its effect is it makes any Covenant Scarab on the battlefield shoot rainbows instead of that green stuff it usually shoots.
This is a reference to "Age of Mythology" where "Wuv Woo" could be entered as a cheat and a big pink pig in a top hat would fly across the battlefield. ("Age of Mythology" was also made by Ensemble Studios)