Korhal Sky Island is a 4v4, 8-players map that debuted on ladder in 2013 Season 4 of Heart of the Swarm.
Official Map Description[]
All of the expansions in the central area have Rich Mineral Fields. If you are able to secure the center expansions you can transition into a mineral heavy strategy.
Referencing[]
Blizzard Entertainment. New Maps for 2013 Ladder Season 4. Blizzard Entertainment. Accessed 2013-06-06.