Green-red unit

s are those that cost only green and red technology.

They are usually very aggressive units that threaten a large amount of damage or utility immediately for a relatively low price. The one exception to this rule is Sentinel, which is a slow but very high value unit if used to its full potential. s are also all Fragile, like almost all Green units, but have less Health compared to mono-green units as a trade-off for their efficiency. For example, Cynestra attacks for the same amount as 3 Gauss Cannons, but has 13 less. Still, almost every can block if needed for defense while providing much more damage (or Chill) than a similarly priced Blue unit might.

Controversy
Some high level players believe that green-red units tend to swing games towards buying one unit over any other because of their immediate power level that is often very difficult to counter without going the same route. On January 19, 2015, Tier X player Allroc posted a long article on Reddit explaining why he thinks green-red units are unhealthy for the game.