Therell be a mix of low mana value permanents that give us 1 life at a time, more expensive permanents with higher amounts of life gain, and a few one-shot big life bursts
Sokrates, Athenian Teacher is a wall that makes you enter a dialogue with yourself, as well, so extra flavor win
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.
Of course, with Pokmon 's original 151 characters being so beloved, personal feelings may always be greater than market value
The attack is one thing and with 140 base HP, Arceus ex can take a hit, but we expect to see this one pop up in a fair few decks based on its interaction with other cards in the set like Carnivine, Crobat and Abomasnow, which can benefit your play from the bench