Griefmaker, the Runeblade of Sorrow

Griefmaker, the Runeblade of Sorrow, is the weapon of Kraz-Thun the Umbra Knight, whom Brennan calls the King of the Pactwraiths BK E1·00:25:51. He arrives astride his wyvern, first among five dark riders circling the Bloodkeep, with Griefmaker at his side BK E1·00:25:38 BK E1·00:25:51.

Griefmaker is the runeblade of Kraz-Thun, who is also Leiland BK E1·00:25:51 BK E1·00:28:28. At the volcano Leiland uses his Hex Blade's Curse on a halfling and unloads with "Griefmaker, Blade of Twilight" BK E2·00:56:34. In the Bloodkeep he plunges the rune blade into the base of a neck in the surprise round BK E3·00:25:44. In the airship battle he teleports below deck with Griefmaker Runeblade in hand BK E4·02:31:20. After the wreck he draws it to follow the tracks of Hamhead, then turns back to the group BK E5·01:19:40 BK E5·01:20:16. In the final battle Matt explains that on a critical hit the struck creature must make a DC15 Constitution save or take an extra 10d10 necrotic damage, and Leiland gains temporary hit points BK E6·02:38:31 BK E6·02:38:51.