Your search for "Molten Tributary 251" revealed the following:
Molten Tributary (DMU) from Dominaria United, available at 401 Games Canada. Rarity: Common Finish: Normal Artist: Yeong-Hao Han Card Text:(T: Add U or R.)Molten Tributary enters the battlefield tapped.
Molten Tributary (Foil) (DMU) from Dominaria United, available at 401 Games Canada. Rarity: Common Finish: Foil Artist: Yeong-Hao Han Card Text:(T: Add U or R.)Molten Tributary enters the battlefield tapped.