That's a bit of an exaggeration - there are likely to be cards in the deck that we want to keep, but I almost assuredly want to pair Eulogist with a Bant deck
And the abilities that the network created itself, like Tromple (an amusing mangling of Trample) simply existed unexplained on some cards until it was illuminated by Adakar Vitionary: And of course, because MTG has so much flavor each of the five colors in MTG have their own style of play, most-used mechanics, naming principles, etc
You get lifegain and card advantage based on the sacrificed creature's power, making it a versatile creature that can fit into many archetypes
It only costs one mana, and, for the cost of two mana and two life, players can activate Phyrexian Reclamation to return a creature from their graveyard to their hand
A big takeaway having gone over each one of these legendary creatures is that they read as a little dated, for obvious reasons