It can be hard to stop value engines like these, especially when paired with our next card
Kagemaru Himeno is the illustrator of these cards, and she has illustrated many classic Pokemon cards, such as Eevee from the Jungle set
But Coram doesnt go all-in on theft like other commanders, which allows deckbuilding flexibility
If you stick solely to Vampire Aristocrats like the precon promotes then I think Clavileno and Carmen are about the same power level where it boils down your own preferences and your own meta: Clavileno is cheaper and provides a slow but consistent payoff, whereas Carmen is more expensive but also more explosive and randomly becomes more powerful if you happen to play against decks that sacrifice a lot (fetchlands, treasures, other Aristocrats etc.)
Maybe the most obvious home is Ad Nauseam, which can not only use Glorious End to buy an extra turn to win the game but can also just use it as a Time Stop with the help of Angel's Grace
Compared to some of the other mechanics first introduced in Future Sight, or even other mechanics on this list, delve isn't actually all that egregious