This recursive loop relies on a clever marriage of resurrection and sacrifice, transforming Boonweaver Giant into an endless engine of life and death. By feeding the Giant to Yahenni, Undying Partisan's activated ability, you trigger the protective loop woven by Necrogen Communion: the Aura ensures that whenever the Giant dies, it immediately returns to the battlefield, and its entry-level search ability simultaneously fishes Necrogen Communion right back out of the graveyard to reattach itself. Yahenni happily accepts the sacrifice, grows larger with every iteration, and grants you an infinite parade of enters-the-battlefield, leaves-the-battlefield, and death triggers to seal your victory.