Flat Earther

 is a Tier 5 Tank that upgrades from Antivaxxer and Consumer at level 60.

Design
The looks like the Consumer but with another barrel added to its existing Machine-Contagion barrel resembling Antivaxxer's smallest barrel. It is a bit wider than Antivaxxer's barrel though. It can also be described as the Sprayer-Contagion to Consumer's Machine-Contagion.

Trivia

 * This tank's name is a reference to the conspiracy that the Earth is not round and instead a flat disc, popular in conspiracy circles.