Black Knife Assassins from Elden Ring return in Nightreign. These swift fighters can jump and dash around to dodge player attacks or dive back into the fray, so they’re hard to reach with slow weapons. They can grab players and perform a heavy-hitting stab, as well as do quick dagger slashes.
Additionally, they have a special attack where they’ll draw Death energy on their blade and throw a projectile at players, dealing heavy damage over time and reducing their max HP for a time. Players should avoid these at all costs, so standing nearby the Assassin is safest.
These bosses have low poise and HP, so they can often be staggered to death when they’re caught once. Try to anticipate their attacks and read their movement, and the Assassins will be defeated swiftly.