Xenniiyarria, Grand Fortress

Xenniiyarria, Grand Fortress enters the battlefield tapped.
Xenniiyarria, Grand Fortress doesn't untap during it's controller's untap step.
{t}: Add {w}{w}{w}{u}{u}{u} to your mana pool.
{w}{u}{b}{r}{g}: Untap Xenniiyarria, Grand Fortress.
{t}: Add {w}{u}{b}{r}{g} to your mana pool.
{t}, {w}{w}{u}{u}: Create twenty 1/1 white warrior creature tokens with firststrike and vigilance.