Its a three-mana 2/2 Vampire, which can make it good in any deck with Vampires at all, but its also one with built-in card removal
On TCGplayer , Mickey's Ruby ink Legendary card holds a market value of $29.94 USD at the time of writing
Unlike the previous set, this grabs your deck so you built around it
It makes it far more expensive to pick up the individual packs, coming as they do either with frippery and extras like coins, oversized cards, or sleeves, that bulk up both the contents and the price, or in individual booster packs at $5 a pop
It's a useful piece of protection in a five-color Slivers deck, making it much harder to pick off your swarm with targeted removal (which is already a bad strategy for combatting Slivers)
While we may get Llanowar Elves, Elvish Archdruid, Dwynen's Elite, and Lathril, Blade of the Elves in Foundations , I don't think those cards can realistically beat a Day of Judgment deck