While most decks want nothing to do with this card, it performs well in a few specific situations, particularly in the 99 of Arcades, the Strategist, Dargo, the Shipwrecker, and a few others
A 4/4 Golem for five mana that gets -4/+4 whenever it blocks or becomes blocked, the key appeal of Karn is the manner in which it interacts with your other artifact cards
She is also a co-host of the Vorthos comedy podcast, The Loregoyfs, and she comprises a full 25% of The Felidar Guardian (specifically the right hand, left ear and both scapulas)
For a more adventurous feel, consider a "Dark Jungle" theme, featuring Pokmon like Venipede, Accelgor, or Arbok, especially cards with shadowy, dense forest artwork
However, the degree of defects could be even more severe, resulting in a nearly complete loss of their visual aesthetics
Ectoplasmic Fortification Ectoplasmic Fortification If you control no monsters: Add 1 Level 6 Zombie monster or 1 "Call of the Forgotten" from your Deck to your hand