Each unsaved Wound caused by the Revered Spear of Tlanxla counts as 2 unsaved Wounds when calculating combat results. In addition, if Kroq-Gar is mounted, the Revered Spear of Tlanxla grants Kroq-Gar +1 Strength in the turn in which he charges.
Source: Warhammer Fantasy: 8th Edition
Each unsaved Wound caused by the Revered Spear of Tlanxla counts as 2 unsaved Wounds when calculating combat results. In addition, if Kroq-Gar is mounted, the Revered Spear of Tlanxla grants Kroq-Gar +1 Strength in the turn in which he charges.