Zilean Easter Egg

Hey guys, me and my friends found a Zilean easter egg! There was a random ward that spawned by the outermost tower. It had a cryptic message about maybe having been their for all of time. I wasn't able to get a screen shot of it cause the enemy team destroyed it to fast but if anyone has any knowledge about it let me know. For people wondering it was Ashe, Zilean, Warwick, Bard, and Maokai vs Nami, Miss Fortune, Annie, Kha'zix, and Fiora. I'm not sure what ward skin it was because it was half in the tower, it had a red top, and sorta looked like a robot. Any information would be great, let's get to the bottom of this!