@JeremyECrawford does sneak attack or colossus slayer triggers hunter's mark each one?

— Felipe Pincelli (@felipefirebrand) March 15, 2016

Hunter's mark deals its damage when you hit with an attack, not each time damage is dealt. #DnD https://t.co/XK2CeTMZhu

— Jeremy Crawford (@JeremyECrawford) March 21, 2016