Hello all!

Me and my friend were disputing about rot mechanics and decided to ask here - how does rot works exactly?

He says: each tick there is a check on con. If check failed, con goes down, if not - con remains untouched.

I say: there is no saving throw vs con each tick. If rot is landed, it will decrease con every tick while it's on the character.

Who is right and who is wrong here? Or, if we both are mistaken, how does rot works exactly?

Thanks in advance and happy new year and marry x-mas to everyone!
Cheers,
- A