Shadow Evocation, Greater (Elemental Assessor)

You tap energy from the Plane of Shadow to cast a quasi-real, illusory version of an elemental assessor spell. Azata champions developed this spell to deal with fiends with unknown resistances. A ray of spiraling colors springs from your hand and streaks to its target. You must make a successful ranged touch attack to hit your target with the ray, which deals 2d6 points of acid damage, 2d6 points of cold damage, 2d6 points of electricity damage, and 2d6 points of fire damage. If an affected creature succeeds at a Will save to disbelieve, it takes only 60% damage from the attack. The type of energy that does the most damage to the target then persists, dealing another 4d6 points of that damage type per round for 1d4 rounds. Each round, the target can attempt a Will save to disbelieve and take only 60% damage.