This charming loop relies on Deadeye Navigator's soulbond ability to repeatedly blink itself, but it needs a little help to turn those trips into a self-sustaining engine. That’s where Leyline of Abundance and Song of Freyalise come in: thanks to the mana-generating abilities granted by Song of Freyalise and the extra green mana pumped out by Leyline of Abundance whenever a creature is tapped, your creature can effortlessly pay for its own activation costs. Meanwhile, Urabrask the Hidden ensures your blinking crew can jump right back into the action with haste as soon as they hit the battlefield, creating an endless cycle of enters-the-battlefield and leaves-the-battlefield triggers.