Command an army of skeletons with the power of Dark Power to defend your castle. Annoying humans from all walk of life, such as local villagers, magicians and knights want to destroy you. Curse them and make them scream in terror by your greatness and power. Defend your castle to the bitter end with warriors and magical spells. After each round you can choose to upgrade your soldiers, castle, and magic spells based on your planned strategy and necessarily.
Also make sure to check out Little Sentries Game, you may enjoy playing it.