I've tried the "Black Magic" stuff before and it worked alright, but once I switched over to "Stump Likker" - they ate the entire log I had it on ( Seriously ate the whole log!!! )
I also buy those large mineral blocks and salt blocks; but I drill rings around then and then split them with a hammer and spike. That way I can turn one big block that's easily seen - into several smaller blocks that are a bit easier to hide. Then in some cases, i'll even bury them 3/4 into the ground length ways. ( that way when it rains, it creates a very large and deep mineral site )….
Last year however, I decided to make my own attractant juice. I took apple juice and heated it to a boil, added mineral salt, rock salt, and corn syrup, and finished it off with jello mix...… If I remember correctly; cost me like $10 to make 5 jugs worth. And the deer loved it!