The model gains Ambush. In addition, when declaring if the model will Ambush (during step 8 of the Pre-Game Sequence), you may declare that the model Ambushes from an Impassable Terrain Feature instead of the Board Edge. If so, follow the rules for Ambush but replace all instances of Board Edgequot; in the rules for Ambush with edge of any Impassable Terrainquot;.