The General Executioner achievement is awarded for defeating all 16 of the Daedric Generals or groups of Generals which can appear at the end of Dark Anchor battles at Dolmens. Note that simply taking part in the battle is sufficient, you do not need to personally land the killing blow, though you should try to get at least one hit in. Simply healing or tanking the battle may not credit you with the achievement. This achievement will allow you to purchase a Dark Anchor Pinion for your home. It costs 100,000 and can be purchased from any Fighters Guild Hall Steward.
Each General has an equal chance of appearing at any Dolmen, but prior to Update 12, the dolmens in your home Alliance zones would only spawn specific Generals. So if you were missing any, you could go to your home Alliance's zone where that General was more likely to appear. The Dolmens in the first zone of your Alliance would never spawn Generals. Now Generals are chosen based on which are needed by all of the players present at the dolmen when they spawn, so the smaller the crowd, the greater the odds are that you'll find a General that you're missing.
The Generals are as follows: