Drill Down!

One use only. May be activated at the end of a friendly Movement Phase, if:
• The model’s unit, with the exception of the model itself, consists entirely of Height 1 models.
• The model’s unit is neither Engaged or Shaken.
Effect:
1. Remove the model’s unit from the Battlefield.
2. The model’s unit gains Ambush (Terrain Feature with a friendly Tunnel Marker). It automatically passes any Ambush Rolls.