The secret to a Muldrotha deck is to have lots of different card types in your graveyard at all times
Its all upside with Primal Odin, and 6 mana even feels cheap compared to some of these other cards
Each character card has an assigned number of Lore points that they are worth when that character goes Questing
Youre usually going to use it to just get rid of the biggest threat on the board, but the fact that it can be used in other ways really helps the utility of this card in Commander
Because of this the best case for staying at 20 life resides in heads up play with larger singleton decks
The current sets available in Standard include Innistrad: Midnight Hunt, Innistrad: Crimson Vow, Kamigawa: Neon Dynasty, Streets of New Capenna, Dominaria United, and The Brothers' War