Pergola

 is a Tier 5 Tank that upgrades from Necromancer and Gondola at level 60.

Design
The greatly resembles the Necromancer but all of its spawners gain the proportions of Gondola's spawners. It can also be described as two Gondolas stacked on top of each other, with one rotated 90 degrees so all sides have spawners.

Trivia

 * A pergola is a lattice structure usually used in gardens to allow plants to grow around it while also letting light in. It is unknown why the tank was called this, but it is presumably because it sounds similar to Gondola.