Any card? Maybe, but I think this is somewhat obtuse. Most players would agree that Dark Ritual and Rancor are two of the best cards at what they do, and in all of Magic. For me personally, including these cards in each deck I made that has the capacity for them would be... mentally lazy? When it comes to casual Constructed, what's the point of playing if you're just going to coast with the same cards that are the best tools in the game all the time? Where's the challenge? Does anyone even enjoy playing against someone like that? If you're a competitive player, or if you don't keep multiple decks at a time, that's a different story. Otherwise... I think you use powerful cards as a "crutch", and you lack style. I'm not saying not to use Dark Ritual, I'm saying I don't like the idea of "Black? Automatic Dark Ritual.". And that's all totally fine. I'm not gonna rag on a guy just because he plays with his favorite black deck with Dark Ritual, Dark Confidant, Desecration Demon, etc.. I guess I'm really talking to deckcrafters (which, I think, many people on this forum are). Maybe it only applies to me because of the way I play the game (I actually play most other types of games with this mindset). I have 25 assembled decks right now, 7 of them have black, and 3 of those have Dark Ritual (yikes, even that's a lot compared to 1 deck with Rancor). If you're gonna call yourself a deckcrafter, branch out! Challenge yourself! The fact that something exists doesn't negate a hypothetical supposition of that thing. What I'm saying is I'm not explicitly defining exactly what all cards are "crutches", nor which environment these "crutches" are used, nor what all type of players use them.