Purify the Hord

Destroy all non Protoss creatures with power 2 or less

Why do you seek the Purifiers?"
"Brothers, you were created to protect the empire, yet
we did not treat you as you deserved, as true Templar. I implore you to forgive our ancestors' mistakes, to take up your ancient charge once more,
and join us as equals.
-Executor Clolarion and Artanis