In earlier Magic, big creatures always had a big mantainance cost (ex. al aq ia).
Some years ago, this ceased to be. When did that happen?
Also, was there some official statement about that (bonus if it's by Rosewater), or it "just happened"?
edit (I really thought this was crystal clear...): I didn't mean there aren't new creatures with upkeep, I meant there are some without it. Before that, AFAIK all of them had it.
