Your search for "Rotting Regisaur 111" revealed the following:
Rotting Regisaur (M20) from Core Set 2020, available at 401 Games Canada. Rarity: Rare Finish: Normal Artist: Randy Vargas Card Text:At the beginning of your upkeep, discard a card.
Rotting Regisaur (Foil) (M20) from Core Set 2020, available at 401 Games Canada. Rarity: Rare Finish: Foil Artist: Randy Vargas Card Text:At the beginning of your upkeep, discard a card.
Rotting Regisaur - Promo Pack (PM20) from Core Set 2020, available at 401 Games Canada. Rarity: Rare Finish: Normal Artist: Randy Vargas Card Text:At the beginning of your upkeep, discard a card.
Rotting Regisaur - Prerelease Promo (Foil) (PM20) from Core Set 2020, available at 401 Games Canada. Rarity: Rare Finish: Foil Artist: Randy Vargas Card Text:At the beginning of your upkeep, discard a card.
Rotting Regisaur - M20 Reprint (PLST) from The List, available at 401 Games Canada. Rarity: Rare Finish: Normal Artist: Randy Vargas Card Text:At the beginning of your upkeep, discard a card.
Rotting Regisaur - Promo Pack (Foil) (PM20) from Core Set 2020, available at 401 Games Canada. Rarity: Rare Finish: Foil Artist: Randy Vargas Card Text:At the beginning of your upkeep, discard a card.