The race is neat, flavor-wise, but I'm pretty sure I'd never play it. The advantages basically boil down to resist necrotic and speed 7, which are nice, but not nearly nice enough to compensate for the lame racial power. It looks like the racial utilities were designed as a balance, but the two shown are quite weak as well.
So, it's a race that's squarely mediocre...without the penalty. With the penalty, it boggles me to think that anyone would ever play the Vryloka except for flavor reasons -- and I admit the flavor is very well done.
I'm surprised that anyone thinks the racial ability is good, let alone remarkable. The only racial ability I can think of that's WORSE is Goring Charge. I think I'd even rather have Infernal Wrath than this, and that's saying something.