[Clipper]

Yeah, it's a special rule that only comes into play when blending those two specific decks, so it only needs to be in the rules. It's not the only example of this either. Demons from Munchkin Fu get a bonus against Clerics if you have blended with a set that has Clerics, for example.

The prevalence of such set-specific rules is why I made my rules checklist available. I've tried to gather every set-specific rule that doesn't appear on the cards themselves.