Which hero do you like?

It's enough to fill just one cell in the second row, and that's it! As they say, done is done!

It's not always worth filling a new cell with a skill. The more cells there are, the lower the chances of upgrading the desired one. Sometimes it can determine the entire upgrade process in the early stages (better to have one powerful skill than two that are almost there):smile02: :smile02: :smile02:
Although, I wouldn't miss the opportunity to give a Nature mage Necromancy.