Jeskai Artifacts relies on Goblin Welder and Goblin Engineer to recur artifacts from the graveyard, so Tormod's Crypt strips their graveyard of recursion targets and Disruptor Flute naming Goblin Welder or Goblin Engineer makes those spells cost {3} more and stops their activated abilities. Mycosynth Lattice is a high-upside inclusion since our Karn, the Great Creator shuts off opposing artifact activated abilities entirely once Lattice makes everything an artifact, locking their whole board. We trim Sink into Stupor and Eldrazi Confluence since they don't interact with the graveyard-recursion plan efficiently, and Lorien Revealed is too slow against their fast low-curve artifact aggro. Karn is excellent here both as a threat and as a lock piece against their nonland artifact-based deck.