Invader is a 1v1 map created for the 2016 season 2 ladder pool of Legacy of the Void, and was removed in 2016 season 3. It was created by the mapmaker Avexyli.
Official Map Description
This map's large open regions, natural expansions, and intricate engagement areas near its spawn points make for a massive and intense macro game.
References
Blizzard Entertainment. StarCraft II. (Activision Blizzard) Map: Invader (in English). 2016.