Kingdoms of Amalur: Reckoning Factions Walkthrough Part 4 – The Travelers: Jailbreak
Fast Travel to Ohn's Stead and head through the doors. Go forward and to the right, going up the stairs. Take a moment to deal with the Gnomish sentries so you can peacefully talk with Grim Onwig and explore the room for hidden doors and items. Talk with him to hear the overall options, breaking him out by stealing the key, picking the lock or collecting the Missives of Sable and using it as a bargaining tool to get everyone out of there.
Grim's Stealth Kit
Head to the northwest of Onwig carefully. The first room starts with a single Gnomish sentry. Dispatch him then head carefully forward, using the tents as cover. You can pick off the sorcerer and if you are really good, the Sentry as well. IF not you will find yourself fighting them with five more Gnomes who are backing them up. Two Sorcerers and three Sentries.
Once that fight is done, continue along the passage to the west and south. Head through the door and creep up the stairs leading southeast. There you will find Centurion Gastet. You can either engage him in open combat or stealth kill him or pick pocket him for his key.. Loot his body to get some loot and the Centurion's Key.
The Missive of Sable
Head through the passage to the north and east. Jump on down and head to the north through the door. Continue into the next room where you will find a Jottun looking the other way. Deal with it and deal into the next room. Be sure to look into the enclaves of the passage to find chests (the one on the right is guarded by a ward so be careful). Now head northeast to the next door.
Keep to the sides to avoid the various spiked traps that are sitting in the floor. Go up the steps and into the next room. There you will find a trio of Jottuns, two warriors and a runewielder. Dispatch them quickly or brutally, your choice. Either way, once they are gone, continue to the west and turn south. Remember to keep to the sides to avoid the spike traps that litter the center of the floor.
You will find a Jottun warriors that are guarding the Missives blocking your way. If you kill him quietly, it will be a quick fight. Otherwise you need to face him and two other warriors.
Once you have the missives, make your way to Centurion Gastet. Just give him the text and he will give you the key for the cell door to free Grim. Either way, follow him out and head back to Star Camp. Talk with Crilgarin to finish the quest. This will finish all your quests at Star Camp and it is time to head for Moon Camp in the Plains of Erathell.