Without 'Lost and Abandoned', you will encounter the first chosen during the first retaliation mission. With 'Lost and Abandoned', the first chosen will appear during that story mission and it will always be an Assassin.The chance for a Chosen to appear on a mission is based on territory and their own separate timer.Which can then be equipped on soldiers after a research project on that Chosen's equipment is completed. Each Chosen will grant XCOM their unique weapons when they are defeated in the Citadel.The Chosen on the strategy layer will cripple XCOM by using different tactics, such as reducing XCOM's income.The opponent that appears will almost always be the Chosen in control that mission's region. All Chosen are immune to all mental impairment status (Disoriented, Panicked, Stunned, Mind Controlled, etc).Their power develops as the game progress, gaining new strengths and increasing health, damage, and armor.At least one of their weaknesses will be from one of the Resistance Faction soldiers (Reaper, Templar or Skirmisher).Each Chosen has random strengths and weaknesses that will always be unique to each member.Given enough information, said Chosen can then assault the Avenger. The Chosen can all daze (an effect similar to Stunned) soldiers, and from there can kidnap and interrogate them for information.This will continue occurring until the Citadel Assault Mission is successfully completed. When a Chosen is killed on a mission, it is resurrected at their Citadel and can appear again in future missions.The Chosen are able to appear on missions and harass XCOM soldiers.Known similarities between the Chosen include: They are boss-type enemies similar to the Alien Rulers, but with some key differences. The Chosen are three new unique alien enemies introduced in XCOM 2: War of the Chosenas the titular main antagonists, consisting of the Assassin, Warlock, and Hunter.