Finishers/ Surprise /Alternate win conditions Sometimes you reach a point in the game where you need just a finishing move to claim victory, other times you keep a low profile only to set up a big surprise that will devastate your opponents and some rare times you can steal the victory by just doing something out of the ordinary
Legality depends on the tournament format -- Marchesa, the Black Rose can be legal in some formats and banned or restricted in others
Whenever this creature attacks, double its power until end of turn
Forcing your opponents to attack opens them up to retaliation and lets you block creatures they might be intentionally keeping out of combat
Hard to want to destroy Junji, the Midnight Sky when theyll just reanimate the best thing in any graveyard
While Im not looking at this as a best investment type question, I know it may go that route but would love to hear some answers about obscure cards with rich history and low cost if they exist