It doesn't have to attack the same player, planeswalker, or battle as your legendary creatures
This card's not particularly useful, but the main reason it's expensive is the nostalgic factor that comes from nearly every Pegasus card
Condition: NEW Brand: Wizards of the Coast Language: Japanese Set contents: 1 Booster Box: 12 Boosters
Spellcaster Monsters are among the most popular Monster Type in Yu-Gi-Oh
It likely goes well in a hybrid mill/attack/skies strategy, as Jaces Phantasm and Wight of Precinct Six suggest is viable
Not background necessarily, but some other line of text that says something along the lines of Whenever you sacrifice a Treasure token, give a creature a +1/+1 counter and trample until end of turn. That would make it a lot more interesting and powerful, but I suppose not every card needs to be great