Wait, my bad, monsters cannot take marks. Here's what can:
Beastlord
Doombull
Great Bray-shaman
Wargor
Gorebull
Bray Shaman
Gors
Ungors
Ungor Raiders
Tuskgor Chariot
Minotaurs
Centigors
Bestigors
Razorgor Chariot
Cost of 2 points for Khorne, Nurgle and Tzeentch, 1 for Slaanesh. (10 and 5 points for characters, respectively)
Mark of Khorne = Frenzy
Mark of Tzeentch = 6++, stackable, and Wizards re-roll channel attempts of a 1.
Mark of Nurgle = -1 to hit in close combat
Mark of Slaanesh = auto-pass Fear/Terror/Panic
Primal Fury is still the same, as is Beastmen Ambush. You can also now roll on the Reign of Chaos table (I'll post later) with the same rules as I stated in my previous post.