Twinned Concentration

When you cast this spell, you can warp the nature of your spells you cast, gaining the ability to fuse separate spells into one for the purpose of manipulating more magic. For the next minute, you can concentrate on two spells, but they must be two separate castings of the same spell. For instance, you can cast and maintain concentration of two separate castings of witch bolt, but you can not use this spell to concentrate on witch bolt and detect magic. When you must roll a concentration check, you roll a seperate check for each spell. If you fail a concentration check, you lose concentration on both spells.