Even though Viscera Seer is a widely available Common from Magic 2011 that has seen multiple reprints over the years, having a serialized and unique variant offers collectibility while not hurting the price of the more accessible printings of the card
For example, an X mana symbol does not usually add anything to a cards mana value, except in specific situations
This not only grants you benefits, but means you can exile potential threats from other graveyards too
Starting the game with a standard 5000 power stat and 5 Life, her value centers around pacing the match and completely disrupting the opponent's attacking tempo
Not only does it phase out all your permanents, but it also buys you a turn and protects your life total
Unown currently is represented in the Trading Card Game by the most cards of any Pokmon after Pikachu, with 90 unique cards