One of the biggest reasons this card ranks highly is that you have a easily triggered card draw that costs you no mana, so a free sacrifice outlet like Phyrexian Altar does incredible work with your creatures: drawing and paying for spells with very little assistance
Players earn points for participation and winning matches: Players earn 3 points for each Draft event they attend at Just Games (yes, including Commander Draft, which will include 1 pack of Final Fantasy!) Players earn 1 point for each match they win in a qualifying event (winning your table at Commander counts for 1 point, going 3-0 in a standard draft is 1 point)
Daniel Holt, Senior Game Designer: Final Fantasy games are so rich with flavor, beloved characters, and unique settings that choosing a single game as the theme provided more than enough material to design a full deck of cards around
Chief: I guess that Urza didnt feel guilty until later in his life
Generally, it's not simply because they're the best MTG cards