Arcane Denial is easy to cast, replaces itself and gives the opponent a consolation prize
Not only that, but its not unreasonable to equip Thief's Knife to something more evasive later in the game and get a ton of value
That said, it's one of those cards that's really easy to overestimate and I guess that's what happened here
Saskia the Unyielding also gives you access to four colors for deck crafting, and seeing how theres only one blue werewolf across all of Magics history, you won't be missing it
That's likely due to Tolkien's high-fantasy world being so similar that one could imagine Middle-earth as just another of Magic's many planes
9 Entomb One Of The Most Efficient Graveyard Tutors Because these tutors are part of the black slice of MTGs color wheel, anything that can place cards into your graveyard is also highly effective, as they can be brought back from the yard with various reanimation spells