Quintorius Kand, for example, can score free discover 4s, Tezzeret the Seeker can be used to tutor for various artifacts, and The Eternal Wanderer can wipe the board and rebuild it at the same time
One card in particular that I think could use another look is Patron of the Moon: (EDHREC Rank: #620) While the card is expensive, its Moonfolk offering ability allows you to discount the mana cost by sacrificing a Moonfolk, and you can cast it an instant speed
Those are good cardslongtime favorites of Commander rules committee member Sheldon Menerybut they look less powerful at first glance than they actually are
"Fantastic!" Illustrated by: Colin Boyer Multiverse ID: 634843 The Ninth Doctor Commander decks Not Legal Traditional Standard Not Legal Traditional Alchemy Not Legal Traditional Explorer Not Legal Traditional Historic Not Legal Traditional Timeless Rulings 2023-10-13 The Ninth Doctor's ability triggers during the untap step and goes onto the stack at the beginning of the next step (usually the upkeep)
Prosper, Tome-Bound is no exception, and will fit right in amongst these other Rakdos commanders
