It can effectively shut down graveyard strategies in any format, from the Dredge deck of Modern to reanimator commanders such as Sedris, the Traitor King or Meren of Clan Nel Toth (and it can be cast for free in the opening hand)
With the big spells coming down, it should clear and create a path for your giant Elemental tokens to walk in and beat down your opponents
Already a seasoned battler
But in multiplayer your options and outcomes are no longer so reductive or cutthroat
Meanwhile, Rosewater's post also names another popular D&D character - the villainous Wizard-turned-Lich, and lesser deity, Vecna, from the classic Greyhawk setting - interestingly in the form of "a card that creates a legendary creature token named Vecna"
In the VMAX form, however, Leafeon VMAX is the third most valuable card in Evolving Skies