Liandry's Torment is currently broken
The following is a bug report I just sent in because we just figured it out. If you build Liandry's Torment, you're losing damage because the item is bugged. Try replicating it for yourself in the practice tool.
While in game many times we noticed that we would do no damage so my friend and I jumped into the practice tool and were able to replicate it. (Most easily replicated on amumu) 1, build liandrys torment 2, put out a training dummy 3, turn on w and burn the dummy (note 3 types damage tickers: 2 magic (blue) and 1 % of health (white)) 4, walk away and let the dummy heal with w still going 5, walk back up to the dummy and let the w hit it again (% of health (white) damage is gone, dps is changed too)
this can be remedied if you auto attack the target (It allows the % of health damage to burn again) This is amazingly detrimental to ranged mages considering most close range champions don't build liandrys.
Expected result, Liandrys burns for a percentage of their health Actual result, Liandrys shows the animation but does no extra damage
-BSR