Do you know which series or set this sticker is from? Can you identify the series for this sticker? Or even better, do you know which set it is from?
Welcome. This is part 52031pb093 - Wedge 4 x 6 x 2/3 Triple Curved with Gold and Silver Ring Ornament on Dark Green Pattern (Sticker) which comes from set 76006 Iron Man: Extremis Sea Port Battle from 2013.