Play Boosters cost 57, contain 14 cards with 14 rares, and are designed for Limited formats and casual collecting
The entire set as one sells for over $10,000, and it is only rising, but this Maleficent card is the most expensive of them all because it is a powerful card that has since become iconic in many Ruby-themed decks, not to mention the artwork is fantastic
But the real reason why Lin Sivvi was so broken was the legend rule at the time
Nahiri, Forged in Fury also requires assistance from Jor Kadeen, First Goldwarden, Kellan, the Fae-Blooded, and other creatures
You just need ways to maximize your hand size for beats, so that'll be things like Reliquary Tower and card draw like Fact or Fiction and Tidings