Don't remember Grave very clearly. But wouldn't be surprised.

Re the actor playing the Faun: Oh, no, that's not who that actor played on Buffy. Hinton Battle from Dreamgirls played the Demon in OMWF - a broadway veteran. The actor who played the Faun - played one of the Gentleman on Buffy, the skin demon in Same Time Same Place, and the Fish character voiced by David Hyde Pierce in Hellboy. He's a stunt actor who does excellent mime work, but never uses his voice.
Can't remember his name, but trust me - it was NOT Hinton Battle.

Thanks for the rest. Yes, that's what reminded me of Buffy the blood falling on the portal, except here it has the opposite effect, opens as opposed to closes.