It's a cool card, but it also- an Octopus that has eight syllables in its name, eight lines in its card text, is an 8/8, has exactly eight "8" digits on it, has ward eight, costs eight less to cast if you have eight or more instants and sorceries in your graveyard, and has a starting generic mana cost of eight
All noncreature spells turn into +1/+1 counters on Vivi and minor burn damage to your opponent
Example: Thoughtseize should be bad in Grixis Deaths Shadow against Abzan as the matchup is so grindy, but you need a way to stop Liliana of the Veil before it hits the battlefield and uses its -2 ability
Gilgamesh is a sort of "goofy" adversary who is often not really evil, he just tends to be in your way for some reason or other
Dusclops and Dusknoir both have to be used strategically , as they both give the opponent a prize card to place damage counters on the opponent's Pokmon