Deadlock Fun fact 810:
Back in the day, there was a bug in the game where the shop was treated as a unit capable of taking damage from gunfire.
This allowed players to farm Wraith card stacks and Shiv Rage stacks simply by shooting the shop between fights.
It also worked with healing items such as Leech and Bullet Lifesteal. It worked on all shops: friendly, enemy, and even closed ones.