Defensive Magic

Defensive magic can be conjured in the form of shields. These shields can only hold as much damage as mana imbued (mana/10 = damage blocked) (e.g. if shield has 200 mana then it can hold 20 dmg), A shield can also be held for an extended period of time but requires an extra (mana imbued/2) per turn. It can also have more mana inserted as a reaction (e.g. monster hits shield and it would break but mage imbues another 100 mana to keep it up).