At the end of your Movement phase, this model can attempt surgery on one friendly INFANTRY or BIKER model within 3". If it does, roll one D6; on a 1 that friendly model loses 1 wound, otherwise it regains D3 lost wounds. Each model can only have surgery attempted on it once per turn.
Dok's Toolz (Aura):
While a friendly INFANTRY or BIKER unit is within 3" of this model, each time a model in that unit would lose a wound, roll one D6: on a 6, that wound is not lost.