Regrowth is an augment spell with a range of 24". The target unit instantly recovers D3+1 Wounds' worth of wounds lost earlier in the battle. Each cavalry model recovered in this way counts as 2 Wounds lost earlier in the battle, not 1.

The wounds in the unit are regained in a strict order. First, the champion is resurrected, and then the musician (standard bearers are never resurrected – if the bearer's been slain, the banner is gone for good), displacing rank- and-file models as required. Then rank-and-file models with multiple Wounds (including command figures) are healed to their starting value. Finally, any remaining wounds resurrect rank and file models (in the case of multiple wound rank and file models, the first resurrected models must be fully healed before another can be resurrected, and so on). These models are added to the front rank until it reaches at least five models – additional models can then be added to the front or rear rank. If the unit already has more than one rank, models can only be added to the rear rank. Regrowth cannot take a unit beyond its starting size, and cannot be used to heal characters or their mounts. The Wizard can choose to extend the range of this spell to 48". If he does so, the casting value of Regrowth is increased to 15+.