Your search for "Colossal Dreadmaw 640" revealed the following:
Colossal Dreadmaw (J22) from Jumpstart 2022, available at 401 Games Canada. Rarity: Common Finish: Normal Artist: Jesper Ejsing Card Text:Trample
Colossal Dreadmaw (J25) from Foundations Jumpstart, available at 401 Games Canada. Rarity: Common Finish: Normal Artist: Jesper Ejsing Card Text:Trample (This creature can deal excess combat damage to the player or planeswalker it's attacking.)
Colossal Dreadmaw - XLN Reprint (PLST) from The List, available at 401 Games Canada. Rarity: Common Finish: Normal Artist: Jesper Ejsing Card Text:Trample
Brachiosaurus // Colossal Dreadmaw - Jurassic World: Life Breaks Free (SLD) from Secret Lair Drop, available at 401 Games Canada. Rarity: Rare Finish: Normal Artist: Dan Mumford & Thomas Roach Card Text:Trample
The Colossal Dreadmaw - Test Card (MB2) from Mystery Booster 2, available at 401 Games Canada. Rarity: Rare Finish: Normal Artist: Marika Lord Card Text:TrampleYou may cast creature cards from your hand as though they were the card Colossal Dreadmaw....
Brachiosaurus // Colossal Dreadmaw - Jurassic World: Life Breaks Free (Rainbow Foil) (SLD) from Secret Lair Drop, available at 401 Games Canada. Rarity: Rare Finish: Foil Artist: Dan Mumford & Thomas Roach Card Text: Doctor Who: RegenerationTrample