Activate Ashnod's Altar by sacrificing Whirler Rogue, adding CC.
When Whirler Rogue dies, Nim Deathmantle triggers, causing you to pay 4 to return Whirler Rogue from your graveyard to the battlefield and attach Nim Deathmantle to it.
When Whirler Rogue enters, it triggers, creating two creature tokens.
Activate Ashnod's Altar by sacrificing a creature token, adding CC.