Out of the dozens and dozens of characters in starcraft: brood war, I think that the Dark Archon is one of the least used units. I don't understand why this is so. They have the ability to cast maelstrom, which quite literally freezes the ravenous zerg dead in their tracks. The feedback ability is great too. Lets say you have a full energy Dark Archon (250 energy). YOu see someone coming into your base with five high templar. You feedback them for the mere cost of 50 energy. Your enemy loses one of the most vespene expensive units in the game. These two abilities alone should be enough to encourage their createion, but there is one more ability that these psionic entities posess. The brain-washing Mind Control ability. You can mind control a worker unit from another race, and beat your enemy in the face with their own type of units

If you were to ask me, there is no excuse not to get these units, so i can only guess why they are rarely produced. Im guessing that its because of the research required to unlock all of its abilities. That costs a lot of resources. Thats what i think, what d you guys think?