In FAQ 3.0 We have this new entry: "(4.19) Printed Any reference made to "printed" be it cost, STR, icons, etc. only refers to the referenced item physically printed on the card itself. A card like Summer Reserves (Scattered Armies F119) does not have a printed cost or STR for instance. Any card effect that looked for the printed cost of a card without a printed cost would fail to find any cost and would return a null value, no item that could be referenced."
Could someone give us a clear explanation? Is "null" equivalent to (printed)zero? For example, could VB kill a reinforcement character?