I've been staying away from the relics in Topps' 2012 set, but this is one I couldn't resist.
A Mr. Cub bat card. This is a nice addition to the Ernie Banks collection.
The back of the card calls Ernie "Mr. Clutch" and tells how he had his 12th and final walk off hit on April 13, 1969.
I did a little digging and found an article from the Milwaukee Journal that tells the story:
You'll have to click on the article for a better look...sorry about that.