Timberdrake looks intimidating, but is a very simple boss. It uses Fireball, which does mediocre damage, and its casting is signalled by a roar. Otherwise, Timberdrake only has a melee physical blow. Overall, Timberdrake is just not very aggressive and doesn't have a very high damage ouput, and doesn't have a lot of HP for this point in the game to boot. Powerful alchemy attacks can swiftly bring it down.
With Timberdrake's defeat, the player gets 2,200 experiences, 2,000 coins, and the Lance.