While Terra can take some work to make her truly effective, the precon already offers an excellent start with some incredibly powerful combos and consistent value returns
In addition to this they offer a one off fixing which is huge for a deck that has so few specific coloured sources and often wants to play three or four different colours
Opt is Standard-playable, while Preordain is a Vintage staple, banned in Modern
The arrival of Fabled marked the beginning of a new set rotation for competitive play, with the first four sets being removed
Pyre Hound: limited, but if I have a bunch of instants and sorceries in contructed, this thing can get big
The card can shine in pretty much any casual Commander deck that runs red, as it practically pays for itself (and then some) most of the time