Heart Tank

The <3 (no, the name of the tank was not "Heart Tank"), was a tank that could upgrade from TESTBED Overdone. It has only been seen in the public by developer events.

Appearance
It looks like a basic tank with a heart somewhat on the side.

Technical
It probably is just like a basic tank.

Strategy
It's only available in TESTBED events, so how should we know?

Trivia
This probably won't get added in game, but please add pics.