For example, Nibelheim Aflame can have a white creature deal damage to a creature with protection from red
Playing them early makes them hard to remove and will almost always give you benefits
Ramping out your plays a turn ahead of time is worth spending a card on, and you can always trade it off if you have to
Edgar, Master Machinist Wizards clearly went out of their way to make Edgar, Master Machinist fair, between the once-per-turn clause and the fact that the artifact it casts enters tapped, but I refuse to believe that we cant crack this like an egg we should probably start with Krark-Clan Ironworks
So, overall, both in terms of the card itself and its in-game utility, you can see why Mufasa is so sought after
You may cast this spell any time you could cast an instant, allowing you to get this into play at a key moment