As you predicted, I was most pleased with this chapter. The epic spells are good, of course -- I especially liked the new seeds -- but I was pleasently surprised by the new incantations and weapon abilities.
I disagree with the pricing of Accursed's second mitigating factor (-10 is too good; I'd make it -5), but that's a minor issue. Actually, looking at the spell I'm not really sure why it needs the compel seed since it already has transform -- since the spell is changing the target directly (not using the powers of Hell), I see no need to make them choose the path. These changes would lower the DC to 148, or a nice round 150 without XP cost.