One of Stefan’s numerous exes will pop up this season… with a vengeance. Tessa is a fellow vampire, natch, and she’s spent centuries hunting down the Salvatores. She’ll first tangle with Damon, whose daylight ring will conspicuously go missing in her presence — and that’s really bad.
Edit: TV Guide have amended their spoiler, which now reads as follows:
A shady lady-vamp is coming to Mystic Falls, and though at first it seemed like she was one of Stefan’s numerous exes, she’s actually in town to see Silas. This is not necessarily a happy reunion.