Activate Tortured Existence by paying ({B} magic symbol) and discarding a creature card, returning Revolutionist from your graveyard to your hand.
Activate Tortured Existence by paying ({B} magic symbol) and discarding Revolutionist.
Revolutionist is discarded into exile instead of your graveyard due to its madness ability, causing you to pay ({3} magic symbol) ({R} magic symbol) to cast Revolutionist for its madness cost.
When Revolutionist enters the battlefield, it triggers, returning Burnt Offering from your graveyard to your hand.
Resolve the Tortured Existence ability from step 3, returning a creature card from your graveyard to your hand.