Hail Mary

A story-gated boss fight. Vampyr bosses are level-checks more than skill-checks - if you hit a wall, you're under-levelled, and the quickest fix is embracing a citizen or two for a big XP spike (at the cost of that district's health). In the fight itself, open with a Blood Spear stun then bite to refill blood, keep healing serums stocked, and dodge the big wind-ups rather than trading blows.