Its presence is the only visual difference between a 1st Edition card and a Shadowless one everything else about the two printings looks the same
Keep an eye out for the metalcraft keyword on cards
Left-Handed Magic Cards, Magic The Gathering
Now, looking past the obvious picks, heres the stuff power players actually use to dial in runs across games like Slay the Spire : has rotating Monster Train Daily and Expert Challenges that remix mutators and difficulty ladders, perfect for repeatable test runs and score pushes
Send 1 Fusion Monster from your Extra Deck to the Graveyard
(Some abilities can also target unexerted cards.) But not using them has less of a direct benefit - you dont need to defend your life points, as in MTG or Yu-Gi-Oh!, so leaving cards upright is typically only worthwhile if theyre likely to be challenged by your opponent and you need them for a future turn