A KO in the Estoc Trials is when someone has no spies and no troops. KO stands for Knock Out, you can be knocked out, you can knock out someone or you can knock yourself out.
How do you acquire aqua/inferno? I know you have to have the Mage but where do you get it after that?
You can get aqua/inferno in certain ebs and PvP is placer versus player. Like a war with only you and one other
Aqua and Inferno are both dropped from certain Epic Battles, for more information, you can check this thread PvP stands for Player vs Player.
TSK - You're talking about a 1v1. PvP is Player versus Player, where you hit another player, not a particular player. I've also realised that I posted the wrong link Correct one