Lucky Charms has two wilds, the frog prince and the non-amphibious princess, which appear in reels two and four. When both land anywhere on the reels after a single spin, magic happens. The frog prince blows off the curse laid upon him to become human -- plus morph into an expanding wild. Reels two and four are thus covered with wilds and three free spins are awarded.
Likewise, the treasure chest and key symbols appear only in reels one and five respectively. When these two combine, a bonus prize of coinage is revealed.
Finally, reel three hosts the bonus wild, symbolized by the magic wand. This one acts like a standard wild symbol and comes equipped with a 2x bonus multiplier on winning combinations.