I have a question about the Armor Abilities in Reach. Reading about them on Halopedia, I came across one called "Evade". Now, I've seen the Elites use this in campaign, but it says here that both Elites and Spartans should be able to use it in multiplayer. But in all the games I've played with friends, none of us have found it. It is something that can only be found online or do you have to unlock it?