"On the Terran side, we played one round specifically to assemble as many Thor units are possible. These are high level ground units, and are actually constructed on the field of battle by an SCV, instead of built at a facility. They're about as big as a building too, brandishing two gigantic arm cannons. While their shots are powerful, these thing are extremely slow to turn and fire, so they didn't seem that effective at attacking by themselves. They're big targets too, and with only a few siege tanks to back them up, the aggressive AI quickly took them out, even though we had a few SCVs assigned to repair each of them. Thor also have a special gun attack that, once triggered, unleashes an artillery barrage for several seconds from four cannons mounted on the unit's back. One unit we kept getting railed by while using Terran is the Protoss immortal, a heavily armored land machine with some extremely powerful cannons. It attacks fairly rapidly, but they're particularly difficult to take out, at least with the Terran army we were putting together, consisting mostly of heavy attack units."