Arclight Phoenix is a card that excels due to the Modern card pool, but wasn't printed for a "specific deck." Humans.dec is rather incidental since Humans are the most common tribe - only in Innistrad were they considered a tribe. I'd say that the two modern decks that Wizards has been purposefully printing cards towards in recent years are Spirits and Zombies. Spirits is now one of the stronger decks in Modern, while Zombies still has much to be desired, but that doesn't mean WotC isn't printing new zombie cards in order to make the deck competitive.
The way to see this is to look at Zombie cards in Standard, see the lack of meaningful support for them in a given Standard environment, and then look at how many zombies are waiting to get utilized in Modern. Wizards wants them to be a thing, much like they wanted Spirits to be a thing so they kept tossing the deck new toys.
It's clear from Modern Horizons that WotC is also hoping to strengthen Blue as a color in Modern. It has long been said that Blue decks are the least prevalent in Modern, outside of UW control. Horizons has given us a plethora of new cards that force Mono-blue or Blue-dominant decks. Wizards is probably trying to make Blue in Modern what blue used to be in the early days of MtG - albeit more balanced :-D
Edit: I'll also add that though Wizards has also been printing many Modern-focused cards recently with the specific intention of combating linear decks. So though Wizards isn't printing cards to support one *specific* deck, they're clearly tossing us tons of new SB options in order to make Fair, interactive decks more viable.
The way to see this is to look at Zombie cards in Standard, see the lack of meaningful support for them in a given Standard environment, and then look at how many zombies are waiting to get utilized in Modern. Wizards wants them to be a thing, much like they wanted Spirits to be a thing so they kept tossing the deck new toys.
It's clear from Modern Horizons that WotC is also hoping to strengthen Blue as a color in Modern. It has long been said that Blue decks are the least prevalent in Modern, outside of UW control. Horizons has given us a plethora of new cards that force Mono-blue or Blue-dominant decks. Wizards is probably trying to make Blue in Modern what blue used to be in the early days of MtG - albeit more balanced :-D
Edit: I'll also add that though Wizards has also been printing many Modern-focused cards recently with the specific intention of combating linear decks. So though Wizards isn't printing cards to support one *specific* deck, they're clearly tossing us tons of new SB options in order to make Fair, interactive decks more viable.
GWUBRDraft my Old Border Nostalgia Cube! and/or The Little Pauper Cube That Could!RBUWG
Modern:WDeath & TaxesW | RUGRUG DelverRUG