2 cards where the name is exactly “river serpent”

Set Name Cost Type R La Artist USD EUR TIX
AKH 66 River Serpent {5}{U} Creature C EN Christopher Moeller $0.03 €0.04 0.03
PLST AKH-66 River Serpent {5}{U} Creature C EN Christopher Moeller $0.10 €0.06

It is the moment of discovery, the triumph of the mind, and the end of these results.