When is a creature's toughness calculated
At what point is a creature's toughness calculated? 


It's continually calculated. The real question is when does Korozda Guildmage's ability check the creature's toughness.

Korozda Guildmage's ability checks the creature's toughess as it resolves because it's not needed before then [CR 107.3e]. Since the creature no longer exists at that point, last known information is used [CR 112.7a]. Effectively, that means the total toughness of the creature at the time it was sacrificed is used.


  If I have a creature that is 4/4 and cast Giant Growth to give it +3/+3 then sacrifice it? Do I get 4 tokens or 7?


&#x37;. Giant Growth increases the toughness of a creature.


  Also what if my 4/4 creature was dealt 2 combat damage before I sacrificed it? Do I get 2 or 4 creatures?


&#x34;. It's a 4/4 with 2 damage marked on it. Damage does not reduce toughness. (Well, damage from a source with wither or infect can reduce toughness, but only indirectly, by virtue of giving -1/-1 counters.)


  Finally, what about counters?


+1/+1 counters, -1/-1 counters and any other similar counters affect toughness.


  If my 4/4 had a +1/+1 do I get 4 or 5 tokens?


&#x35;. Effects that modify toughness (such as Giant Growth's or Glorious Anthem's) modify toughness.