These decks typically play game-ending legends like Emrakul and Atraxa, dumping them early and reanimating them for an easy win with their namesake card
ADVENTURES IN THE FORGOTTEN REALMS You Happen on a Glade & You Find the Villains Lair Adventures in the Forgotten Realms powered down Standard, and so it has fewer underplayed cards than most sets this year, given the clear divide between playable and not playable
If youre damaging your creatures with enchantments, artifacts, or anything else that isnt a creature, Tamanoa is up your alley, but sadly isnt legendary (hopefully feedback WotC has received often enough to be resolving soon, but until then feel free to pay an extra red mana to trigger Flameshadow Conjuring to get double the life)
White weenie strategies are as old as MTG itself, and theres usually a Standard white weenie deck thats at least competitive
Other than that, any lockdown strategy that prevents your opponent from damaging the player's Life Points or renders them unable to play cards is effective