The Super Tank is an expensive, tanky unit with salvo. The Super Tank has it all: above average damage, high health, armor, and salvo. However, this comes at the risk of granting your opponent 3 Combo Power, not to mention its high cost. The Super Tank excels at being a durable yet powerful frontline unit.
The Super Tank's achievement is:
Block an attack with the SUPER TANK.
Seeing as the Super Tank has 2 stacks of armor, blocking attacks is no big deal for it. The Super Tank is a very pressuring force on the battlefield by forcing your opponents to destroy it, which means they will have to get through its armor.
At tournament standard
The Super Tank has 236 health and 144 damage at level 3, terminating these units in one blow, ignoring armor or evasion: