The Grim Ogre is a large monster. Defeating it can yield Brinebeast Ore, Brinebeast Fragment, Monster Hide, Ogre Talon, Aged Beast-Steak, Gauntleted Petticoat, Fine Harspud Roborant, Ogresbane, Jasper, Giant Hunk of Rift Crystal, Wakestone Shard and Allheal Elixir. During a fight you can also pilfer Exquisite Roborant, Sunstone, Wakestone, Jewel-Woven Sandals and Braided Boots from it, along with some of the same materials.
The map has 9 Grim Ogre spots, with 2 around Mired Conduit. Single spots sit near Bakbattahl, Caliginous Depths, Collapsed Mine and Echoing Depths. In the Unmoored World it has 6 spots, 4 of them around Vernworth and 1 near Final Proving Ground.
Brinebeast Ore
Brinebeast Fragment
Monster Hide
Ogre Talon
Aged Beast-Steak
Gauntleted Petticoat
Fine Harspud Roborant
Ogresbane
Jasper
Giant Hunk of Rift Crystal
Wakestone Shard
Allheal Elixir
Exquisite Roborant
Sunstone
Wakestone
Jewel-Woven Sandals
Braided Boots