THEY ARE COMING! NEWS!

Hi Last game I was playng as shaco and when Katarina (the skin was the "realms" one) used Q on me, I used Q to run away and 1 moment before the invisibility wearing off, I ulted. The symbol of "THEY ARE COMING" appeared on my clone, I was near the second turret top, red side

If anyone could provide the link to the symbol, it would be great, I can't find it