Species Specialist is another typal death payoff, although one thats more flexible
In the background, we can also see part of Snowpoint Temple, meaning that this Piplup is sitting in Snowpoint City building a snowman
as this deck will show you, you rarely ever run out of options or things to do
It's also better in multiplayer than a normal Fog as you can Fog two players, rather than just one
Cards that genuinely take advantage of this are few and far between, so your best use of Serras Sanctum would simply be to put it in an enchantress deck.
Given Kiawe gives two Fire-type energy, you could theoretically slot this two-card combo into a deck of any type, giving slower decks more opportunity to deal early damage and put your opponent on the back foot