Similarly to Delver of Secrets, Darcy is very aggressively statted and fits best in decks playing cheap non-creature spells to trigger its ability
Chart shows the price of Mars #154 at the end of each month going back as long as we have tracked the item.
Also particularly useful against massive tokens decks like soldiers or goblins once Sanguine Bond is out
1 Holo Pokemon Card (V, V-Max, V-star, Ultra Rare, Secret Rare, Art Rares, Full Arts, Illustration Rares, etc!)
You will find a Dragon, you will cast that Dragon, and you will protect your Dragon without the opponent having the option of paying a token mana fee to get out of it
The best of the best that you cant really skip out on are Vryn Wingmare, Thalia, Guardian of Thraben, Linvala, Keeper of Silence, Strict Proctor, and Wandering Archaic