Patch reference

Passive: Hallowed. Gain a stack every 3s, up to a maximum of 3 stacks. Whenever the wearer takes damage from a player-controlled unit or Roshan, all stacks are removed to create an all-damage barrier for 7s that absorbs 120 damage per removed stack (up to 360). If the wearer reached a max amount of stacks at least once in a game, regaining a stack provides a non-stacking buff that increases movespeed by 20% for 7s