Imagine that you can remodel Kancolle version of Takao and I-401 using atleast 5 blue print each and change them to fog fleet and when you level them high enough and another 5 blue prints merge Takao(fog) to Iona to become Ars Nova form and you can toggle between 2 different form with each form able to equip certain weapon. And Iona is able to fire the super graviton cannon regardless of mode but at certain rate.
kancolle needs supergravity canon equipments, the fire power takes 50% of the remaining ammo on the ship equipped. high power on full ammo tank but ammo depleting fire on the downside