Archon stacks also increase your Attack Speed, Armor, and Resistances by 1%.
You also gain Archon stacks when you hit with an Archon ability.
"Vyr created his famed obelisk to gather the power of the Archon, a being he claimed existed on a different plane of reality. He is even reputed to have stored this macabre power in armor of his own design." —Abd al-Hazir