Yep.... There's deathcore now with black metal infuence.
Well, the only band I know of like this is Frozen Water Burial... And they aren't that bad.
"Frozen Water Burial started out in the month of April of 2006. We now have a solid line up of 6 people. Together we created a unique style of music by blending our musical influences. The transitions from fast shredding hydro grind parts to powerful breakdowns, and fast black metal riffs to slow classical melodies, makes FWB a band to look out for. If you want to experience our sound, make sure to come out and see us whenever you can.
-Frozen Water Burial"
Nothing of them online. Only way you can hear them is to get their demo from here:
http://www.mediafire.com/?ind2smfzl4n