With fate being able to reroll any one roll that you have made, can you use it to re roll a creatures/enemy attack, and does it take two fate to re roll a two dice roll such as dice with death, or do you just spend one fate to re roll one die?

1) Fate can only be used to re-roll dice involving YOU not enemies.

2) When rolling multiple die you can only fate 1 dice, not both. regardless of how much fate you have

as per page 6&7 in rulebook

ok but what "involving you" means?

for example, a treasure chest (roll a die and take the same number of gold coins) involve you or not?

if you meet a witch and roll, the roll is about HER action on you, so could you use a fate?

there's a doungeon treasure (i've forgot the name) that allows you to roll after you lose a life point: if you roll a 4-5 or 6 you heal one or two life points (if you roll 1 you must dicard it): the roll is about the object, not the character. so could you use the fate token?

have you ever met other places/strangers which generate troubles like these?