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.)
Zirilan of the Claw MTG Zirilan of the Claws applications are a bit more on the nose, but its no less powerful
That means they generally have an eye more toward fitting into Edge of Eternities' draft and sealed formats (which only use cards from this single set) rather than making waves in constructed formats like Standard or Commander
The combination of mana to accelerate big equipment like Argentum Armor and Kaldra Compleat plus the ability to equip them for free sounds like a winning combination, especially with ward
With Predatory Sliver, however, you can turn your little army into a big one
This magic ship called Lunar Whale is the aircraft that appeared in FF4 in the history of FF