If I have a hex with multi-levels (Cellar, Ground & Lv-1), with a unit in each level, if I place a OBD? on the unit at level 1, does that conceal the units beneath (Grd & Cellar) as well. [See image]
BTW, "stack" is not defined in the ASLRB and contextually, "stack" and "stacking" are not used...