Quote Originally Posted by Raikai View Post
Still, doesn't make any sense to make it tied to Dream Within a Dream... Seems just for the sake of it.


That's the point of the "upgraded" version via Kassatsu. It would not be a land AoE, but a stronger poison DoT on everything.
You get one Kassatsu every 60s, with a choice between two options. Single Target Hyosho Ranryu and AoE Goka Mekkyaku.

If this upgraded Doton is more potent than Goka Mekkyaku, then Goka becomes completely redudant.
If less potent, then the DoT is redundant.

Unlike regular Ninjutsu that has a 20s cd, with charges, where you can easily accommodate for both Doton and Katon.