You can channel an incantation simultaneously with another incantation just like it.
Benefit: You can twin an incantation. Channeling an incantation altered by this feat causes the incantation to take effect twice on the area or target, as if you were simultaneously channeling the same incantation two times on the same location or target. Any variables in the incantation (such as duration, number of targets, and so on) are the same for both of the resulting incantations. The target experiences all the effects of both incantations individually and receives a saving throw (if applicable) for each.
Using this feat increases the channeling DC of the incantation by 8. The incantation’s DC cannot exceed your maximum DC.