Subrule · Chapter 1
cr:1.8.7a
If an effect requires the value of a numeric property from a specific object without that property, then zero is used as the value for the purpose of the effect.
Example: Ravenous Rabble has the text “. . . reveal the top card of your deck. this gets -X{p}, where X is the pitch value of the card revealed this way.” If the revealed card for this effect was Gorganian Tome, which does not have the pitch property, the value of X would be zero.