You may have up to 15 cards in your sideboard, but you arent required to have exactly 15
Pages and pages of backstory, concept art, character sketches, fashionit just goes on
The Warrior is big enough that it can tangle with things in combat, which generally makes it better than a basic land
Whenever Ragavan hits a player, you create a Treasure token and exile the top card of their library, letting you cast it that turn
When you're ready, swap them around and use Dawn to transfer energy accordingly, whereupon Wigglytuff can start hitting with strong sleep attacks
Equip Whenever equipped creature deals combat damage to a player, exile up to one target creature you own, then search your library for a basic land card