Banishers: Ghosts of New Eden

Spirit traps are glowing spirits in cages that are scattered throughout all locations and make a sound when approaching. They can be destroyed with a musket. There are many more than 50 spirit traps in the game, so the trophy will not be difficult.
Video guide (en) with collecting everything in the Dark Forest location.
Video guide (en) with collecting everything in the Muddy Marshes location.
The hint will be updated as guides are released.