Thornmail Balance Change
Okay so with sustain getting nerfed multiple times over the seasons, and the specific sustain that interacts with Thornmail is Life Steal I will be suggesting balance changes to the item (passive specifically) so that it is no longer overpowering in the current era, but still strong, since the current Thornmail has been unchanged since ever.
Thornmail: Blah Blah, everything is the same except the passive.
UNIQUE Passive: Basic attacks deal 10% of the damage as magic damage before being reduced by resistances to the attacker and apply grievous wounds for 1.5 seconds.
Okay so the current number is 30% and not 10%; but does not apply grievous wounds for a short time to the attacker. What this does is put Thornmail in an updated status of the current times while still fulfilling its role with reduced sustain for marksmen attacking you when you have this item. Of course they can still potentially kill themselves upon trying to kill you, but in a fashion that is not so overpowering since the item was created since beta days when sustain in general and life steal was super overpowering and the item has been constantly growing in strength every time life steal gets nerfed.
Hope you appreciate the balance idea! ~ Stacona