Quadral Square

The Quadral Square is a Sentry.

Design
I am actually not sure of the design.

Technical
The Quadral Square has four mounted auto turrets, which have decent firepower (for a sentry).

Spawning
Four Quadral Squares spawn with the Square Sanctuary.

Strategy
There are usually four Quadral Squares that spawn with the Square Sanctuary. Try to get them apart, which shouldn't be too difficult, as they are usually spaced far apart. Why? Quadral Squares can actually overwhelm you with pure firepower if you attack them all at once.