Candlestick seems the best because of the surveil ability, with Knife the next best thanks to its first strike ability
cards, the value of Pot of Desires depends on a few consistent factors: its rarity, the printing and finish (regular or foil), its physical condition, and the set it was printed in (2017 Mega-Tins)
Though Magic has played with machinery in previous expansions such as Kaladesh and Mirrodin, it has always stayed closer to fantasy than science fiction
Mike Pollock (4Kids) (English) Zorc Necrophades ( Dai Jashin Zku Nekurofadesu ) is a destroyer of worlds born from the darkness in humans' hearts and, in the English dub, the creator of the Shadow Realm
Neither is what you want to spend a card to accomplish
However, there may be better cards depending on the specific strategy of the deck, such as Elemental HERO Stratos for searching HERO cards or Fusion Substitute for versatile fusion options