Fanon:Mountain

The Mountain is a Tier 2 tank that upgrades from the Tank.

Design
The Mountain has a wide, short barrel.

Technical
The Mountain fires a huge bullet, without the brutal knockback, that after a certain time transforms into a square, which color depends on the team.

The Bullet Penetration is now called Bullet Lifespan, and is increased a lot.

The Bullet Damage, also, gets into the Destroyer's levels, a bit useful when the bullet isn't hardened.

Reload and Bullet Speed, however, is dropped to rock bottom.

When you shoot a bullet to another already solid, it will increase/recover its health/Lifespan.

As the Mountain
Use the Ol' Reliable: The Barrier.

If someone dares to smash into your wall, well, they keep the Damage from a Destroyer.

Against the Mountain
DON'T EVEN DARE TO GET NEAR IT. It's bullets, when not hardened, have the same Bullet Damage than that of a Destroyer's. Think of that scenario.

Trivia

 * Apologies to any resemblance to any conception here :/
 * Originally, if you fired three more bullets to a wall, it was going to grow a turret.
 * This idea was trashed because of instant OPness.