Starters and extenders are the priority
We can also play Mirror Gallery, Mirror Box, and/or Sakashima of a Thousand Faces to turn off the legendary rule for ourselves
"Mist Archfiend" was once a pretty reliable way to trigger it after taking down an opponent's monster thanks to its high ATK, but this now remains true only in retro formats like HAT and Edison, as it is too slow to be useful nowadays
Starlight Rare cards feature a rainbow-colored foil on the card name, and a bright, rainbow-colored foiling across the art and all borders, and other parts of the card
Patrol Night One or two target creatures each get +1/+0 and gain first strike until end of turn
But what does this term mean and how can you tell if your card is Shadowless