[ke_ivan]

Once upon a time, there was an ability called the 250mm cannon. It was a long forgotten ability that hailed back to the campaign days. It was resurrected by Jinro to defeat the Mighty Kratoss Protoss President MC. Heck, even Blizzard tried to tweak/increase its usability by giving it a 50-sec cool down. After a while though, they switched the cannons back to energy. I bet no one even remembers that.

<b>So what is the 250mm Cannon?</b>
It is a spell ability that channels 500 damage over 6 seconds a target, and stunning it for x secs. It cannot target air. It also has a 2 second intro and a 2nd outro. Also note that a Thor does more damage out of cannon mode once it has vehicle weapons 1. It is researched at the factory tech lab and costs 150 minerals and 150 gas and takes 110 in-game seconds to complete. It once was a small AOE spell, but now only targets single units.

Aside from immortals, it apparently takes out colossi and leaves ultralisks (immune to stun) with one hp. But with thermal lance, all I can say is lulz to that. They don't stun ultras so lulz to that too. Yet they are prone to feedback and emp.

So what are the cannons exactly useful for?