this Leafeon ex is no delicate leaf
13.3 If the Seller sells a Lot that was unsold at the Sale: (a) within 90 days after the Sale to a person who was registered to bid at the Sale
Between this and the fact that blacks best mana ramp spells only tend to thrive in specific niches of the Commander format, such as cEDH, mono and two color black decks, combo decks, and/or builds with reliable access to Urborg, Tomb of Yawgmoth, theres really no way to rank these cards
The first cards the mechanic appeared on were Frodo, Sauron's Bane, Samwise the Stouthearted, and Gollum, Patient Plotter
This card is primarily the reason why youre so restricted on what non-blue cards you can play (Force of Will being a distant secondary reason), so your hands are a little tied in the deckbuilding process, but again, your options are pretty low here