Conjuration & Abjuration is a Tower Defense that uses a recursive spell-casting system. Each attacking tower cast spells from the inner-most circle to the outer-most, with the next circle being cast upon hitting an enemy.

There are two different tower types: Mana and Casting. 

Mana towers will generate you 1 additional mana per second and cost 1 of each material to create. 

Casting towers are free to place, but adding spells requires materials. To add a spell, click on the tower and choose an element and spell type. Spells can have multiple layers, but each additional layer gets more expensive. Once you finish editing your spell, make sure to save it.