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3) The goal is to assemble the dragon artifact in the shortest possible time. If the time is equal, the winner is determined by the amount of experience (for Faelan). If the amount of experience is the same, then it is determined by the amount of wood.
On HeroesLeague, there are no two indicators; if the results are the same, then the places are also the same.
On HeroesPortal, the second indicator is the hero's stats without artifacts, and also, for a specific tournament, if it involves collecting a specific type of unit (within a time limit), then the second indicator is the number of these units.
I believe that mercury is suitable for HeroesWorld.