Contrary to what most people believe, deathcore is actually death metal fused with METALCORE; not hardcore. There is a difference.
Deathcore features breakdowns, heavily palm muted riffing, death growls, pig squeals, and technical awesomeness.
Some examples of dXc bands are Suicide Silence, Carnifex, Job For A Cowboy (pre Genesis), Whitechapel, Elysia, and Knights of the Abyss.
Deathcore. Yeh. Thumbs up :]