It costs $4 and consists of rules for one and only one model, Bel'Akor. I already bought it, because, hey $4.
He's available as an HQ choice for Chaos Space Marines or Chaos Daemons.
He's 350 points and is basically an alternative choice to the totally-maxed-out daemon princes you see people running around with.
He actually seems pretty different, powerful, yet fair, for his points... very cool character. Daemon prince stats, but,
- he has Eternal Warrior
- he's a mastery level 3 psyker that only knows Telepathy, but he automatically knows ALL of telepathy.
- Wings, no armour, but a 4++ and shrouded.
- A few other more minor abilities
Effort level relative to # of pages on this release seems decent.
It seems that GW will be coming out with these sorts of digital releases quite frequently. Interesting.