Through decades of training and will power you have the ability to concentrate on 3 spells at once (minimum 22 intelligence needed and 20 years of studying for 1 hour a day). The caster only must make 1 concentration check anytime they normally would no matter the amount of spells you are concentrating on. If a concentration check would be failed roll a d3 (d6 divided by 2) the number rolled is the number of spells you lose concentration on. The spells lose concentration in order based on the spells level descending from the highest spell.
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