Would it not work the other way around? Attack with, say, Moses banded to Miriam, play The Exodus to rescue Moses, then play Lamb's Righteousness to rescue a captured hero?
Lamb's Righteousness has a clause that says "If you haven't rescued a LS this turn".
Fascinating. When I went to the Viewer to check, the one on there doesn't have that clause, but the one on the RoJ page under Master Set Lists does. I'll take your word that the latter is correct, but now I'm curious what the source was for the Viewer version.
Looks like different iterations from during the development phase. The printed copy says "If rescuing and your Hero is opposed..."
It wasn't errata'd, was it?