Wrath of Hekaton
Shield of Phandalin
A sentinel shield (armor—shield, uncommon)
While holding this shield, you have advantage on initiative rolls and Wisdom (Perception) checks.
This shield has half the normal weight and feels hollow. It was crafted by a cabal of cloud giant sorcerers using the essence of air elementals. When the shield deflects a blow in combat, the reverberation sounds like a wind that howls an ancient song of warning. The song is momentary but quite loud before it fades. (Elemental Air, Arcane, Song Craft, Loud)