Your search for "Watercourser 137" revealed the following:
Watercourser (Foil) (M13) from Magic 2013, available at 401 Games Canada. Rarity: Common Finish: Foil Artist: Mathias Kollros Card Text:U: Watercourser gets +1/-1 until end of turn.
Watercourser (BBD) from Battlebond, available at 401 Games Canada. Rarity: Common Finish: Normal Artist: Mathias Kollros Card Text:U: Watercourser gets +1/-1 until end of turn.
Watercourser (Foil) (BBD) from Battlebond, available at 401 Games Canada. Rarity: Common Finish: Foil Artist: Mathias Kollros Card Text:U: Watercourser gets +1/-1 until end of turn.
Watercourser - BBD Reprint (PLST) from The List, available at 401 Games Canada. Rarity: Common Finish: Normal Artist: Mathias Kollros Card Text:U: Watercourser gets +1/-1 until end of turn.