Game of Thrones Game of Thrones

Spring is coming — and with it, what may be the bloodiest and most action-packed season of Game of Thrones to date.

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HBO unveiled the first full trailer for Game of Thrones Season 4 before the series premiere of True Detective Sunday night, and it's clear that the War of the Five Kings is far from over — and the number of casualties will soar before it is.

Among other highlights, the clip also offers a glimpse at Pedro Pascal's new character Prince Oberyn Martell — a.k.a. The Red Viper.

Game of Thrones premieres Sunday, April 6 at 9/8c on HBO. Check out the trailer below: