To answer a question posed in the following True Blood trailer: yes, Sookie, now you have to deal with witches.

As teased months ago by creator Alan Ball, season four of his HBO hit will focus heavily on the arrival of a coven of witches. They will be led by Fiona Shaw's Marnie, who we see here creating general havoc all around Bon Temps.

What impact will they have? What will they do to Eric? We'll start to find out when True Blood returns with new episodes on June 26.

Matt Richenthal is the Editor in Chief of TV Fanatic. Follow him on Twitter and on Google+.