This ingenious loop relies on casting Goldvein Hydra for zero mana, allowing it to immediately succumb to state-based actions as it enters the battlefield with zero toughness. That tragic trip to the graveyard triggers Enduring Renewal, which gracefully scoops the Hydra right back up to your hand instead of letting it rest. Meanwhile, Pitiless Plunderer watches the creature perish and eagerly manufactures a Treasure token, funding the green mana needed to recast the Hydra all over again.