Conjure

You are definitely going to love or hate this game called Conjure. You are a very powerful wizard living in his tower but it gets under siege by an unfriendly elementalist. If you want to survive you must hold your keep or destroy the enemy's tower. Use several spells, which are learnt during the game and kill approaching monsters. They belong into four elements and you must use the spells that have the most effect. The control is tricky but after some practice you should be good in it. The problem is its length. The first round will take you more than ten minutes and that's only beginning.