Holding priority, cast Dualcaster Mage by paying its mana cost.
When Dualcaster Mage enters, it triggers, copying Graceful Reprieve, with the copy targeting Dualcaster Mage.
Resolve the copy of Graceful Reprieve.
Holding priority, activate Woe Strider by sacrificing Dualcaster Mage.
When Dualcaster Mage dies, Graceful Reprieve triggers, returning Dualcaster Mage from your graveyard to the battlefield.
Repeat from step 3.
Resolve all Woe Strider abilities from step 5.
This clever loop centers around a self-sustaining cycle of life and death, utilizing Dualcaster Mage's entry trigger to perpetually copy Graceful Reprieve targeting the Mage itself. Each time Dualcaster Mage is sacrificed to Woe Strider, the resolving Graceful Reprieve brings it right back to the battlefield to repeat the process. Meanwhile, Woe Strider's sacrifice outlet doesn't just enable the loop—it also weaponizes every iteration by granting infinite scry triggers to sculpt your hand.