Does the toughness reset every BF phase?

A1istor said:

Toughness isn't something that you use until it runs out, then reset. It works against all uncancellable damage assigned and applied at all times. So if Chaos zaps Pestilence of Nurgle, Nurgle Sorceror then combat and finally Flames of Tzeentch, a Unit's Toughness will work against any and all damage from those source.

al quick you said uncancelable damage and that should have said any damage that can be canceled, or all cancelable damage. Each separate effect that attempts to deal damage that can be canceled will cause Toughness to kick in and cancel its numeric value.

dormouse said:

What's going on with the start of the first sentence ?

Good question I don't know. I'm guessing I ended up accidently deleting a part of a word or phrase. Thankfully the important part made it through.