I dont understand it at all
Each starter deck includes: 1 starter deck of 60 cards, including 2 foil cards of the characters on the package front, 11 game tokens, 1 rulebook, 1 booster pack containing 12 randomized cards.
If you're mana-flooded, overcommitted into a board wipe, or just aren't finding your card draw, being able to recast a spell like this can give you a solid plan on a turn where otherwise you'd have nothing
If your power is all in these expensive finishers, then you need to treat your creature count like a resource and preserve as large a board as possible while ramping to these payoffs
Other pricey cards here include two copies of Thundering Falls, and four of Agathas Soul Cauldron, leading to a TCGPlayer price of $678.87