Your search for "Akroan Mastiff 3" revealed the following:
Akroan Mastiff (Foil) (JOU) from Journey into Nyx, available at 401 Games Canada. Rarity: Common Finish: Foil Artist: Zoltan Boros Card Text:W, T: Tap target creature.
Akroan Mastiff (JOU) from Journey into Nyx, available at 401 Games Canada. Rarity: Common Finish: Normal Artist: Zoltan Boros Card Text:W, T: Tap target creature.
Porthos // Neuroflux Heirloom Token (Foil) (TTRK) from Star Trek, available at 401 Games Canada. Rarity: Token Finish: Foil Artist: Brooklyn Smith & David Frasheski Card Text:Neuroflux Heirloom: Equipped creature gets +1/+1.Equip {2}
Inkay - 068/103 - Common - Reverse Holo from Mega Evolution: Delta Reign, available at 401 Games Canada. Rarity: Common Finish: Reverse Holo Artist: kawayoo Card Text:[D] Knock Off (10)Discard a random card from your opponent's hand.