Shulker Shell Helmet - limesplatus/Ultris GitHub Wiki
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The Shulker Shell helmet is a helmet armor piece dropped from the Shulker Stone boss. When worn, it'll highlight nearby mobs within 16 blocks with the glow/spectral effect, allowing you see to see all mobs near you behind walls.
Additionally, all end mobs excluding the Ender Dragon will become passive, however, if you try to attack the pacified mobs, they will quickly begin to attack you back and they cant be pacified ever again.
The helmet can be merged with netherite, however if attempted the helmet will lose its function. You can revert it back and return your netherite ingot by dropping it on the ground.