Yeah mid tier, when eaten by a character. That's my point. On a sword it becomes much more better than that though. You get multiple blades with elongated range that can be covered in CoA and CoC.
What would otherwise be very vulnerable dog heads made out of flesh and blood, now become bladed entities that can be covered in CoA and CoC.
Any mythical creature that's p4p stronger/more massive than a Cerberus would be (much) stronger as a hybrid mode, but much worse as a DF weapon imo.
I think it's no coincidence that this is the fruit that was put onto Shamrock's sword. It prolly makes up a very powerful combi
Mid tier for a mythical. Would mean still one of strongest fruits out there.
Also, I don't know if the sword Is going to become "three swrod"; I think it's more likely It's becoming one sword with 3 dog's heads.
Also, for my part, I have said what I think about how "vulnerabile" It would be.
Overall, between Shamrock with a sword with Fire powes and 3 heads and Shamrock with a mythical zoan: much more stronger, faster, resistant (etc.) and Fire Powers + the sword, I think the second one would be better.