With a little mana investment via the level up mechanic, Hexdrinker can be a 4/4 that has protection from instants, and thats already a hell of a card
PSA 10 copies are exceptionally rare, representing a tiny fraction of an already tiny total population, and they command five-figure prices that have shown no signs of declining even as the broader market has experienced periods of cooling
One reading note that matters for this rarity more than any other: aggregator "ungraded" prices badly lag this market, because raw Gold Stars trade at a steep counterfeit-risk discount while anything authenticated commands a premium (you'll see PSA 1s outselling raw guide prices below)
If you want to take a look at the current auction, you can find it here.
The most obvious application, however, is a rabbit tribal deck, perhaps with Finneas, Ace Archer or Baylen the Haymaker as your MTG commander
Currently, TCGPlayer lists this song card at a price of $244.00 , though its listed prices have a large range at the time of writing