Training Center

In the training center you can get a skill. There are two options, thunderbolt and invulnerability. Thunderbolt does a lot of damage while invulnerability makes you invulnerable to any attacks during a number of seconds. It is possible to upgrade both skills (costs gold bars)

There is also an option to test my skill, which costs 20 gold bars, this will make you fight against the training bot. Your damage will go one up every time you win against it. It is always 4 damage stronger that you and has more health (about 20), but it doesn't have a skill and potions