Christopher Moeller's original art for Nut Collector (a green rare from Odyssey) is a little over the top. Originally commissioned for Druid's Call (an uncommon Enchant Creature), the painting was supposed to show "a bard playing music which lures out a small army of squirrels."
So what would lure out squirrels? A song about acorns, apparently. The art was just a little too "Unglued" for the team's taste, so they had the word balloon edited out, and eventually swapped art with the card now known as Nut Collector.