
Multiple instances of physical damage applied at the same time will only apply one stack.

However, the two items share the same maximum stacks. This is because the unique passives are not named and they are not the same item. Obsidian Cleaver will apply 2 stacks per instance of physical damage, instead of 1.
DO I STILL BUILD BLACK CLEAVER ON ZED AFTER REWORK FULL
This means the full benefit of the reduction is seen on the seventh hit, after all six stacks have been applied. The physical damage dealt is calculated first, and the debuff is applied after. The very first instance of physical damage does not get the benefit of the armor reduction.


On-hit effects, which is different from on-hit abilities, do not apply an additional armor shred stack.Physical damage over time abilities will apply one stack on every tick.Both passives trigger on both basic attacks and on any abilities that deals physical damage.UNIQUE - Rage: Dealing physical damage to a champion grants 3 bonus movement speed per stack of Carve on them for 2 seconds, up to 18. UNIQUE - Carve: Dealing physical damage to an enemy champion reduces their armor by 5% for 6 seconds, stacking up to 6 times for a maximum of 30%.
