Your search for "mighty leap 66" revealed the following:
Mighty Leap (DDG) from Duel Decks: Knights vs. Dragons, available at 401 Games Canada. Rarity: Common Finish: Normal Artist: rk post Card Text:Target creature gets +2/+2 and gains flying until end of turn.
Mighty Leap (CLU) from Ravnica: Clue Edition, available at 401 Games Canada. Rarity: Common Finish: Normal Artist: rk post Card Text:Target creature gets +2/+2 and gains flying until end of turn.