Apparently, the pesky Shadow Shaman can solo kill Roshan at level 6 with his ultimate; Serpent Wards.
Gigachad moment right there, eh?
Sorry to ruin your pubs.
To the unaware, Roshan has been treated as a 'Hero' unit type by default since patch 6.87, dating back to 2016.
But since the latest patch, 7.31, Roshan is acting like a 'Non-Hero' unit, that allows him to take extra damage.
For better understanding, let's refer to TeaGuvnor's finding below:
Dear @valvesoftware is Roshan meant to be a Non-Hero Unit now?— TeaGuvnor #StandWithUkraine (@TeaGuvnor) March 13, 2022
Roshan has been a HERO unit type since 6.87 (2016)
Since 7.31 Roshan is acting as a NON-HERO (no mention in patch notes), so piercing damage is 150% effective. Allows Shaman to solo rosh at level 6. pic.twitter.com/rnCSc2M2r9
Basically, Serpent Wards deal reduced damage to hero units while dealing a piercing damage of 150% to non-hero units.
It effectively means that Roshan takes threefolds of damage than originally intended, thus allowing Shadow Shaman to solo kill it.