I suggest the following erratum:... Discard to cause all strikes from all attacks of a non-Dragon, non-Nazgûl, non-Balrog creature keyed to a site to fail (resulting body-checks for the creature are modified by -2).
... (resulting body-checks for the creature are modified by +2)
Reasoning: Blasting Fire is a similar card that modifies the body-check by +2, instead. I propose Blasting Fire and Liquid Fire should be equal in terms of the modification. Thematically, a modification by a negative factor doesn't make sense to me, either.