Well what I got in mind is a modern/slightly futuristic tank, not planning to arm it with anything, im going for more of off road capabilities and toughness, something unique. Custom as in your own work and design that has not been done before.

Like one idea that just popped into my head is like a firetruck tank or something that you can drive into water to refill a tank and on top is a controllable turret with a powerful water jet or something like that lol idk

Or even a Tracked body with a crane on top that can pick up things and place them on a attached tracked trailer or something. I not that big on warfare type of things (even though I'm in a modern warship combat group lol)