To get this achievement you must find Benhart of Jugo in three different locations (out of the five), exhaust his dialogue, then summon him for a corresponding boss fight. He must survive the encounter for it to count.
Alternatively: You can simply summon him for Prowling Magus, kill Freya, go back and bonfire ascetic for Prowling Magus again. Clear the way the first time (so Freya ambush is no longer there) then do Prowling Magus so that you have met the conditions (three victories with Benhart alive). After second bonfire ascetic onwards Freya will not ambush and doors will be open, so summon Benhart and run through. Once you have done this talk to him when you next meet him in Drangleic Castle. Thanks to DIRTFATHER for this method.
There are a total of five places that you meet him and can summon him.
He must survive the boss fights for it to count. Therefore, I suggest you clear the path between him and the boss before summoning him. Also, you can use the Redeye ring (purchased from Shalquoir in Majula) to take the heat off him during the boss fight. If he dies then you can either leave (homeward bone/Darksign) or die, then you can try again.
If you miss one of these locations then you are still all right. If you have missed more than one then you may be able to use a bonfire ascetic to redo the location.
Remember that to summon phantoms you must be human, to become human use a human effigy. His summon sign will also not appear if you have the Name-Engraved ring equipped or you have your summon sign down. Thanks to New Legend PL for this.
Locations and Bosses:1. Shaded Woods/Brightstone Cove Tseldora:
Benhart is first found sitting on the ground just before the entrance to the Shaded Woods, this is in front of the room where Rosabeth is. You must exhaust his dialogue, then unpetrify Rosabeth (See 'Change of Clothes' guide), and finally go back to him and exhaust his new dialogue.
You can then summon him for the Prowling Magus boss fight in Brightstone Cove Tseldora. His summon sign is in a tent in the Royal Campsite (where the first bonfire is).
2. Drangleic Castle:
He is in the room with the bonfire just after fighting Twin Dragonriders. Exhaust his dialogue.
You then need to summon him for the Looking Glass Knight boss. His summon sign will be just behind a pillar in front of the fog gate.
3. Forest of Fallen Giants/Memory of Jeigh: (Requires Ashen Mist Heart)
Benhart is found in front of the Giant Tree that holds the Memory of Orro. This is located just after the Pursuer boss battle area. Exhaust his dialogue. Note: he only appears here once you have talked to him in Drangleic Castle. Furthermore, you must examine the Giant Tree and enter the Memory of Orro, he will be inside and you must exhaust his dialogue.
You now need to summon him in the Memory of Jeigh. To get here, go down the ladder from the Cardinal Tower bonfire in the Forest of Fallen Giants and then across the bridge. Across the bridge is a door (You must have beaten the Last Giant to open this), go through and turn left. You should come to an open area with a King's Gate. Equip the King's Ring and enter, take the bonfire. Continue through outside to see a Giant Tree. Examine the tree to enter the Memory of Jeigh. His summon sign will be just before the stairs to the fog gate.
Note: you cannot kill the enemies to the boss before you summon him, I managed this by running past everyone to the boss, he followed me and the enemies ignored us.
4. Throne of Want/Memory of Orro:
You must talk to him in the same locations as described in the 3rd location for him to appear in the Throne of Want.
His summon sign will be to the left of the fog gate. You must use him for Nashandra, note: Throne Watcher and Throne Defender do not count towards this achievement.
5. Dragon's Rest:
In the Crown of Sunken King (previously dlc) area called the Dragon Sanctum, at the bottom floor. You can summon him to help fight against Elana, the Squalid Queen. His summon sign will be between some rubble at the opposite end of the room from the fog gate. Thanks to CraZy Marty 695 for this info.
Inherit the Items:You can finally inherit his gear in the Memory of Orro after three of the above. Simply talk to him and he will give you his set and sword.
Note: it appears that if you have already summoned him three times before talking to him outside the Memory of Orro he will give you his gear first. (i.e. completed locations 1, 2, and 5 above). Thanks to vSully for this info.
