The reason that the card costs so much is that it is pretty much the number one most iconic creature from Magic during that time, with Serra Angel an easy choice for second place
Making lots of money on the collectable side is fine, but there comes with it a responsibility to reinvest in the core parts of the actual game the collectable is based on
3 and Garland, Knight of Cornelia Black Mage Aggro is WotCs title for this one, but Id classify this as more of a bleeder archetype if anything
It's this simplified card structure that makes the deck great for beginners, but there's still a nuance to aggro decks that means you can't just blow all your creatures and spells carelessly and expect to win every match and reach mythic in MTG Arena ranked play
And when it happens, some games will end after you turn one enabler into turn two Cathartic Reunion or Ox of Agonas into a lot of power
The first is that it enters the battlefield untapped, letting you use it right away, such that it only costs a virtual one mana to deploy provided you can make use of the mana it provides immediately