This clever loop uses Woe Strider as a dependable sacrifice outlet that lets you churn through your library with infinite scry triggers while feeding your death-related synergies. The secret to sustaining this engine lies in Gev, Scaled Scorch, whose passive ability ensures that any creature with persist entering the battlefield receives a +1/+1 counter to immediately neutralize the crippling -1/-1 counter it returns with. Because those opposing counters cancel each other out as a state-based action, the creature can be sacrificed to Woe Strider over and over again to generate an endless cycle of leaves-the-battlefield, entry, and sacrifice events.