Mutons

Mutons are very dangerous because they are usually ignored. They do not immediately impose threat, but they can hit soldiers hard. And by hard, it means, death in one strike, or deaths in one grenade. They have plasma grenades that can deal large damage at the time that they appear.

Mutons also have melee attacks that can deal damage in large quantities. They can swing they attacks even to a unit under a half-cover. They also have counter attacks against your Rangers. Be sure when you strike a Muton with your Ranger, the latter will connect. Or the former will execute him / her.

Mutons can also use Suppression Fire, just like your units. These units are organic, but they wear armors. You need to shred those armors first before you can hurt these big *** units.