Iron

The Iron is a Tier 4 Tank that upgrades from the Smasher at level 45.

Design
The Iron has a Smasher body with a silver shell rather than Smasher's typical dark gray.

Technical
The is statistically identical to Smasher, but it is immune to all effects.

Upgrades to

 * (Iron Auger)
 * (Iron Landmine)
 * (Iron Jump Smasher)
 * (Iron Bonker)
 * (Iron Mega Smasher)
 * (Iron Minesweeper)
 * (Iron Pion)
 * (Iron Glass Smasher)
 * (Iron Kamikaze)
 * (Iron Auto-Smasher)
 * (Iron Auto-Smasher)

As the Iron

 * With these tanks you may be able to take the crown of killing an Iceberg, as the chiller bullets are useless.
 * Even though Iron tanks are resistant to abilities, that doesn’t mean tanks with abilities are entirely useless. They can still hurt you, so get strategic in dodging.

Trivia

 * All of the Iron's upgrades were suggested on discord by The Null, with the addition of one by EarthKunGaming.