Arrows can be found in THE CITADEL biome. Look at the walls and floors for traps; when you step on one, you'll get shot with an arrow. Belltowers can be found in the GLOOM biome, and they will stop the sleep effect. The Ritual Dagger can be obtained from Ancient Idols and Ancient Luggage, but only in co-op runs. The Early Worm can be found randomly on the ground somewhere in the GLOOM biome.