Whilst swimming out, going out of its way to smash though ever ship it saw it remembered seeing a road going over the horizon. He wanted to rampage in that town too much it he grew there from the coast it would be too small to be fun. It would need to grow some other critter to carry it inland and help it smash things up.
It set out a wave of growth growing every animals that could control its movement to 200 feet across.
The dolphin addressed all the sea creatures, along with many birds.
"Fellow sea animals, for too long with humans wrecked our stuff. Now with my new power of size I can make any of you huge or you can destroy all their stuff instead. Before you all go off and smash stuff one of you will have a special task. I want to go deep inland, too show the humans they have nowhere to hide. I will need someone to carry me to do this. I will grow this creature even bigger than me. Who wants to bring our revenge to the heart human lands,"
All the creatures cheered. They all wanted to try to get to do this.
All creatures tried to explain why they would be best at this.
Eventually the dolphin decided its steed would be...