Prison of the Seraph

When Prison of the Seraph enters the battlefield, put a prison counter on each creature with power 4 or greater. As long as they have prison counters on them, they are copies of Prison of the Seraph.
{t}: Add {w}.
{2}{w}{w}, {t}, Sacrifice Prison of the Seraph: Create a 4/4 white Angel Horror creature token with flying and vigilance.