Talk:The Grustrag Three/@comment-94.27.162.193-20140228194737/@comment-173.66.186.106-20140228224759

Actually, once you get the mail which gives a deathmark, running invasions gives you the same chance of spawning them as a regular Grineer mission. You don't have to grind invasions over and over. Just go do some regular Grineer missions.