Grimrock

for this you need to place down 4 objects to open the door, can any one give me any pointers where to about the "Severed dread", "Iron Head" and "Mystery unlocker" are?

Also stuck here, fear if it would take me to go back far for required items...
"Iron Head" gave me "click" for "Mystery unlocker" -

ahh so random items sorta, thanks for that though i missed somthing

Severed dread part of the land

damn have go way back for this stupid then ;/ stupid puzzle, i dont even remmember where was it last and i have to waste like 30 mins or even more searching for one