An opponent chooses one of those piles
Can you lie low enough to create a position to win from
Tinker Bell has a moderate Strength of 4 and a good Willpower of 5, but it's her two abilities that make her a powerful Glimmer
Eventually, you should be able to trim enough cards to get down to 23 non-lands across your two colors
Thanks to the wording on a card, despite Caribou probably better-served being folded into the creature type 'Deer' or something, WOTC needs to list Caribou among their creature list
Gettin Mama Odie, Mystical Maven out there early - which should be doable thanks to the cheap cost of the card - alongside a handful of songs, will very quickly put you into a position wherein you can play a lot more cards per turn or a much more expensive, and more powerful, card a lot earlier than your opponent