Force of Vigor gets around any mana costs by letting you exile a green card from your hand instead of paying for its mana cost, much like the original Force of Will counterspell from Alliances
As long as Snow Villiers is on the battlefield (and still a creature), that ability will count Snow Villiers itself
Because this is a new instance of Tidehollow Sculler, it triggers again, and you steal a card
Cogsworth Climbing Clock will almost always have +2 in this deck, making him a powerhouse at banishing
I certainly dont claim to understand it yet, but I wouldnt be surprised to discover that the right sideboarding involves swapping out blocks of cards for similar types in the sideboard, or perhaps bringing in entirely new types to support some that might be leaving
Collectors should know there is also a Secret Lair version, but it is easy to miss because it carries a different name