By enchanting Siren of the Silent Song with Freed from the Real, you create a self-sustaining engine where the Siren's own tapped state fuels its untap ability. Thanks to the mana-granting ability from chapters I and II of Song of Freyalise, tapping the Siren produces the blue mana required to pay Freed from the Real's untap cost. Each time this loop executes, the Siren's inspired ability triggers upon becoming untapped, forcing your opponents to repeatedly discard cards and mill their libraries into oblivion.