Do you go all-in on demons or keep them in the command zone as finishers
Fake cards are everywhere, especially for expensive vintage stuff
Overall, this app has become quite popular among avid collectors and players in the MTG community, especially when it comes to deck building
For examples Lightning, Security Sergeant needs to remain on the battlefield, Grolnok, the Omnivore can only add croak counters if the card went directly from the library to the graveyard (usually because it was milled), and Kaya the Inexorables emblem only triggers at your upkeep and looks at legendaries
Cursed Recording might have the best flavor of any card on this list (although Unstoppable Slash IS pretty good), because its an artifact that gains time counters, and once there are seven or more of those on it, it deals 20 damage to you