The Black Hand are all about amazing infantry and flame attacks. Confessor CABAL infantry can defeat all of their counterparts, and Purifiers make for a monstrous late-game, especially when upgraded. The main downside to the Black Hand is their predictability because they lose stealth and air units.
Units

PurifierThis upgraded version of the Avatar War-Mech cannot acquire new parts from other vehicles, but it is assembled with a flamethrower and a infantry suppression generator.

ReckonerThe Reckoner is Nod’s new APC vehicle, although there are a few key differences between it and its GDI counterpart. For one thing, it can carry two battalions of infantry, instead of one. However, this comes at a disadvantage: infantry cannot fire out of Reckoners
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SpecterSpecter Artillery are Nod’s new siege unit for Tier Three, with Beam Cannons moved down to Tier Two. Specters are automatically cloaked upon construction, so you do not need to waste a cloaking field on them. However, once they begin firing, they are visible to your enemy!
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RedeemerNod’s Epic Unit is the Redeemer, a towering walker armed with a high powered laser and a Rage Generator, which turns all enemy units caught within the blast against each other. Garrison up to two infantry into the Redeemer (permanently) to increase its firepower.
Confessor CABALThis infantry squad is composed entirely of Confessor infantry (that normally require the Confessor upgrade to appear in infantry squads). Confessor CABAL inspire nearby infantry and give them an armor and rate-of-fire boost. They also have the ability to throw Hallucinogenic grenades that cause enemy infantry squads to fight each other.
Upgrades
Tiberium Core MissilesIncreases the damage of Attack Bikes, Stealth Tanks, and SAM Turrets.
Charged Particle BeamsAwakened Cyborgs and Venoms now do more damage (Note that Nod Vanilla can only get Awakened through their support powers, and that Venoms are no longer affected by Laser Capacitors).
Quad TurretsYour turret defenses can now have four turrets per hub.
Purifying FlameAll flame weaponry does more damage. Currently researchable from the Secret Shrine.
Black DisciplesThis upgrade adds an extra Black Hand infantry unit to your militant rocket and confessor squads.
Buildings
Redeemer Engineering FacilityThis new building is the only one that can assemble the Redeemer. It can also build and repair vehicles like a normal War Factory.
Support Powers

Tiberium Vein DetonationThis is Nod’s new super weapon in support power form. Does high damage in a large area.
Laser FencingThis power makes the targeted building immune to C4 and engineer captures. If the building takes a lot of damage, however, the Laser Fencing will become damaged beyond repair and disappear.
RedemptionAll infantry that die within the radius of this power will respawn as Awakened Cyborgs.
Power Signature ScanThe Power Signature Scan instantly reveals the locations of all enemy Power producing structures.
Decoy TemplePlaces a decoy Temple of Nod, identical in every way to the real thing (countdown timer included), except that you cannot actually fire a nuclear missile.
Other Notes
Infantry are trained as veterans
Harvesters are not stealthed
Commandos are trained as heroic, and you can have up to two at any time
No Air Tower or Air Units
No Vertigo Bombers, Shadow Squads, Disruption Towers, Stealth Tanks (oddly, they do get Specters)
No Laser Capacitors or Tiberium Infusion