Click "Learn" at the top of any EM page and then find the link to "Roles". Please study this prior to joining ranked games. Vent is short for ventriloquist. Vent says something but it shows up as someone else saying it. If I am vent and I vent you, saying "Merry Christmas", then everyone is just going to see that YOU said Merry Christmas but you will not be able to see it.