Stonemason Kith is investigating the history of the Grymforge and will ask for the party's assistance. A party member can examine the statue, rubble and general area. Upon passing each skill check, they will discover that the statue is recent, implying two different eras of occupants to the fortress, and that the rubble and glassy stones within the debris indicate the nearby wall was smashed through by something large from the Hells. Bards have the option to pass a single DC 10 History check, with Advantage, instead.
If the party member passes all three skill checks and reports to Kith, he will gift them a piece of Infernal Alloy that he found in the wreckage. If not, it can be bought from his inventory.