This selection is not enough by itself to build a green deck, and also not a green/colorless deck, at least with the cards I have shown so far in this deckbuilding experiment
For three ink, Ariel comes down with a respectable 2/3 frame and can pull a song to hand from the top four cards of the deck and then sing it next turn
The icy palette grades well, high contrast against the snow-flecked feathers is the main grading variable
The general advice from seasoned collectors is that for most mystery boxes, the actual return is consistently lower than the price you paid
MTG cards are also collected for their art, rarity, and value independent of gameplay
Appearing in Enigmatic Incarnation decks, Overlord of the Balemurk has insane synergy with Kroxa and Kunoros