Prophecies - Condition with XXX Corruption

What Does it mean exactly. I had many prophecies with the same Event : Death of heorot, same condition : The age of winter timeline (160 Corruption).

I did that line Empowered and I had to gather 900 corruptions in order to get to Heorot. But loot haven’t trigger.

Do it need to be done under 160? or I had to run it normal and grind corruption to 160 before kill the boss?

This one.

It kind of sounds like you are confusing stability for corruption. You gain stability doing echoes which unlocks the boss fight. You gain corruption defeating the shade echoes.

Ok got it, need to kill the fa node that reset web which give corruption as well