Your search for "Rockslide Elemental 63" revealed the following:
Rockslide Elemental (HOP) from Planechase, available at 401 Games Canada. Rarity: Uncommon Finish: Normal Artist: Joshua Hagler Card Text:First strikeWhenever another creature is put into a graveyard from the battlefield, you may put a +1/+1 counter on Rockslide Elemental.