Dreadwalkers

You are not alone in the dark.
Two new monsters haunt your world at night and in caves.
The Stalker: a tall, thin figure that watches you from a distance. When you look at it, your heartbeat pounds, the world goes dark, and it disappears, then shows up again somewhere behind you. Each time you look away it gets closer. If it reaches you, you’ll find out why you should have kept watching. Hitting it only makes it vanish and come back.
The Killer: a rare, hulking monster with a sack over its head and a cleaver. It doesn’t need to see you to hunt you. It roars when it finds you, and you hear a heartbeat that gets faster as it gets closer. It’s fast, heavily armored, and climbs right over blocks. Its hits slow you down and blind you. If you run too far, it finds another way to reach you.