Harpie Lady Sisters....wait, is that.....?

I have just gotten some super rare Harpie Lady Sister cards from metal raiders. They all look fine to me, but with one stipulation. My unlimited edition cards have a difference. One says it can only be special summoned with the Magic Card and the other says it can only be special summoned with the Spell Card. Does anyone think this is a misprint, and if so, does it give it more worth?

No, it's not a misprint. Back in the day, Spell cards where called Magic cards, but Magic the Gathering sued and forced them to change it. So it's not worth more, except for the fact that it's from Metal Raiders.

Hmmm, still, I'm not sure. If that's the case, then that means that one of my unlimited editions was made earlier than the other, that's not usually what I would see.