Tips. If the player lives in a Crimson world, defeating the Brain of Cthulhu will make the Dryad sell the Worm Scarf. ... The damage reduction also stacks with the Worm Scarf.

Does endurance potion stack with worm scarf?

Combined with the Endurance Potion, the Worm Scarf can make enduring enemies that hit for high amounts of damage a lot easier. Does not stack with the Worm Scarf to give larger amounts of reduced damage.

Does the worm scarf work in normal mode?

Yes everything but the demon heart works in normal mode too.