Your search for "Royal Assassin 101" revealed the following:
Royal Assassin (DMR) from Dominaria Remastered, available at 401 Games Canada. Rarity: Rare Finish: Normal Artist: Mark Zug Card Text:T: Destroy target tapped creature.
Royal Assassin (Foil) (DMR) from Dominaria Remastered, available at 401 Games Canada. Rarity: Rare Finish: Foil Artist: Mark Zug Card Text:T: Destroy target tapped creature.
Assassinate (TSR) from Time Spiral Remastered, available at 401 Games Canada. Rarity: Common Finish: Normal Artist: Kev Walker Card Text:Destroy target tapped creature.
Royal Assassin (30A) from 30th Anniversary Edition, available at 401 Games Canada. Rarity: Rare Finish: Normal Artist: Tom Wänerstrand Card Text:This version of this card has a non-standard Magic back. It is not legal for constructed play.T: Destroy target tapped...
Royal Assassin (Foil) (10E) from Tenth Edition, available at 401 Games Canada. Rarity: Rare Finish: Foil Artist: Mark Zug Card Text:T: Destroy target tapped creature.