. . . to increase/decrease their power level, or to hinder/encourage them being splashed? I'm sure during the Core Set / Core Set +1 environment quite a few people weren't happy with the single loyalty on Rip Dere 'Eads Off!; and I think Repair the Waystones has been mentioned in a balance thread as being underpowered due to its loyalty (I might be wrong).
Which cards would you love to adjust the loyalty of, and why?