User blog comment:Hawki/Nova Covert Ops, part 3 - Reflections/@comment-4817-20161130120308/@comment-4817-20161130234124

For some reason I can't find a "reply" button to "A Fandom user"'s post, so I'll respond here. I hope you don't mind. (I can find that button to everyone else's posts, even my own.)

I didn't say they cannot purify planets, I say they might not be able to do so. We've never seen them do that.

Furthermore glassing a planet takes some effort. The protoss faced determined Sons of Korhal opposition at Tarsonis, so they didn't purify it. They didn't purify it when attempting to stop the zerg from warping away (when they took Kerrigan to Char). I suspect the protoss could purify most terran worlds, but not a well-defended core world... at least not without defeating the terrans first. Doable certainly (the Tal'darim put up a good fight, at least a the harder difficulty levels) but not guaranteed and not immediately. PSH aka Kimera 757 (talk) contribs 23:41, November 30, 2016 (UTC)