Activate Ashnod's Altar by sacrificing Orcish Bowmasters, adding CC.
When Orcish Bowmasters dies, Nim Deathmantle triggers, causing you to pay 4 to return Orcish Bowmasters from your graveyard to the battlefield and attach Nim Deathmantle to it.
When Orcish Bowmasters enters, it triggers, dealing 1 damage to any target and creating a creature token.
Activate Ashnod's Altar by sacrificing a creature token, adding CC.