More than others, Sidisi, Brood Tyrant is the commander I see as the general placeholder for Sultai graveyard decks
These cards mostly produce treasure tokens or generate red mana that disappears by the end of the current phase
Moreover, you can never be quite sure what cards will end up in your hand
The second effect allows the player to add either a white or a black mana to their Mana Pool, but the Murmuring Bosk then deals 1 damage to the player
Norn's Annex Among the multiple pillow fort cards we have to play, Norn's Annex does the job, but barely
Because of this wide variety of effects, these cards mostly see play when they directly support a decks core strategy rather than because a deck is specifically in the market for 3mv mana dorks