Chained to Garagrim's wrists so he will never lose them, these twin axes were given to him by his father on his coming-of-age. Each is inscribed with a Grudge Rune and the Master Rune of Skalf Blackhammer.
If you wish, when Garagrim makes a charge he may attack like a Doomseeker rather than normally (including the effects of the axes' runes and his Slayer skills).
In subsequent rounds he can only attack normally, though he gains one extra attack for carrying the paired axes, as noted in his profile. He makes his normal attacks for the purposes of Deathblow.