Is this Demon good? I would say so! Getting 6 power for 4 mana is good enough, having flying is better, and having trample means that it’s going to punch through a lot of defenses. The cost of having to sacrifice a creature isn’t a big one, especially if you’re sacrificing a small creature or a token, anyway.
The beauty of Core Sets is that they tend to have cards that are simple for newer players to understand. The drawback is that many of them don’t end up being that good in competitive decks. So, it’s even better when simple, but effective cards like this are competitively playable. Demon of Catastrophes certainly is.
As a Demon, a popular tribe in Magic, you can be certain plenty of players are happy to add this creature to their collection. Early on, even as a $1 card, foil copies were selling for $8 or more! This is the case even with so many promo foil versions available! Many players are experimenting with him in a variety of deck strategies, including in Commander!
How would you play Demon of Catastrophes?