Talk:Iron Shrapnel/@comment-25689473-20150102155043/@comment-9294424-20150220014435

Duration actually does affect the damage of Miasma. Miasma's damage ticks are calculated by "total damage divided by duration measured in seconds."

Take the base damage of 1500 over 4 seconds. That's 375 damage per tick.

Now Saryn's minimum power duration (excluding Arcane Chlora) is -87.5%. That is a 0.5 second duration. 1500 damage divided by 0.5 second duration comes out to 3000 damage.

Different people seem to report different numbers, but they all end up with extra damage when the duration falls below 1 second or -75%.