Crown of the Bone King – night vision (Bone King).
Pharaoh's Mask – Haste I (Pharaoh).
Captain's Tricorne – water breathing + dolphin (Captain).
Ember Heart – fire resistance in hand (Ember Lord).
Frost Heart – no freezing, Speed I (Frost King).
Eye of the Void – sneak while falling = float gently (End Warden).
Dwarf King's Hammer – pickaxe, mines 3×3; sneak = single block (Dwarf King).