The Blood of Dawnwalker director Konrad Tomaszkiewicz recently teased the legendary abilities players will need to possess if they want to kill the final boss right after the prologue, and now we have a little more context around why that's going to be such a humbling stretch goal. According to Tomaszkiewicz, you'll be "quite easy to kill" for about half of the time you're playing the game.
Talking to Edge Magazine for issue #427, Tomaszkiewicz says protagonist Coen's nature as a human-vampire hybrid makes him particularly vulnerable when the sun's shining. See, Coen is essentially a human during the day, stripped of most of the Vampiric powers that keep him safe when the sun goes down.