The fairly obvious thing with Karn is that the more artifacts you run the better he is
Cards playable at launch: Sword & Shield: Everything released Sun & Moon: Lost Thunder, Team Up, Detective Pikachu, Unbroken Bonds, Unified Minds, Hidden Fates, Cosmic Eclipse Card not playable at launch, but still transferrable: Sun & Moon: Base Set, Guardians Rising, Burning Shadows, Shining Legends, Crimson Invasion, Ultra Prism, Forbidden Light, Celestial Storm, Dragon Majesty XY: Everything Released Black & White: Everything Released Accessories: Many coins, card sleeves, and deck boxes are transferrable, with a maximum of one copy per item
It's a synergetic cascade and smash deck with lots of smaller effects to cascade into for value, like Wall of Blossoms and Satyr Wayfinder that should always be good
You choose a target (if any) for the ability after you've drawn and looked at all of the cards and finished resolving the spell or ability that caused you to draw them
however, that means having to play at least two of our zeros without getting to draw a card to replace them
Cyrus (Trainer / Space-Time Smackdown) Cyrus allows you to force a benched opponent's Pokemon into the active spot, as long as it has damage on it
