There's a lot of stuff going on with Vraska, Betrayal's String that makes it worth the steeper price point, such as the aforementioned Poison Counters, the Proliferate effect, and even the ability to neutralize threats by turning them into treasure artifacts with its most costly attack, this card can end the game with its Poison Counters alone
For many, this is a piece of Magic history from the same year Jurassic Park hit theaters, and its value now reflects its status as a cornerstone of one of the games most popular niche formats
For example, we're going to be running very few creatures, so Liliana, Dreadhorde General, while a great planeswalker, isn't great here
Control, however, is completely missing
Sometimes, but most people are happier foiling selectively
It's not a highly efficient source of damage, and by playing it, you're not playing the burn spell that may finish off the opponent