Two years was neither too long nor too short.
Watson had a really fulfilling two years. His level had not improved, but his strength had increased dozens of times during the past year. That was because he had been training and learning every day for the past two years.
First, he had to learn magic from Antonio and Sylvan.
One was the most powerful mage in the kingdom, while the other was the greatest mage in the kingdom; they possessed a thorough understanding of magic. For example, they could not cast spells that took too long to cast when they faced warriors with a short attack range. When confronted with a mage with the same long attack range, they first had to identify the opponent's magical attributes. When facing one or more people, the spells they had to cast were also different.