There should be alot more of them, it makes no sense that runes like corrupted guardian, centaur savage, rip demon, etc are only 1 faction.
I definitely agree with OP,, I was actually thinking about this not long ago..everytime u make a split rune (considering its well done), it opens up countless more combinations when deck building, mtgo started doin this way back and it only served to make the game better...I wasnt really into the split thing for a while,, but I was mistaken,, split is good. so last nite I was looking at some KF runes, garu in particular, and noticed one of them (I ferget) has Pride of aulir* , IS ally,, and on the caption it even says something about how they agree with leoss (or something , it was late)...this should be kf/is and playable in a leoss deck through iS, and its a shame its not... so split the deck and deal em out.