Maybe. But when he swings 3 or 4 times before his invulnerability goes away.. probably not. Plus, he also has a team to back him up.. infinite Gatekeepers.. they don't kneel.. they don't die by anything but a sword of crota. And LIGHT level matters more than anything when using a SoC, so, you would, yet again, do no damage to a gatekeeper even with a sword. Infinite of them do enough damage to kill as many of the Borderlands Players as it needs to.