Unlock the hero "Swordsman".
Unlock the hero "Warsmith".
Unlock the hero "Arsonist".
Unlock the hero "Crusher".
Unlock the hero "Sorceress".
Unlock the hero "Mask".
Unlock the hero "Healer".
Unlock the hero "Devourer".
Get the 5th level.
Get the 10th level.
Get the 15th level.