Activate Malevolent Chandelier by paying ({2} magic symbol) , putting Orcish Bowmasters on the bottom of your library from your graveyard.
Activate Grenzo by paying ({2} magic symbol) , putting Orcish Bowmasters into your graveyard from the bottom of your library, and then putting it onto the battlefield.
When Orcish Bowmasters enters the battlefield, it triggers, dealing 1 damage to any target, then creating a 0/0 Orc Army creature token and putting a +1/+1 counter on it.
Activate Ashnod's Altar twice by sacrificing the Army and Orcish Bowmasters, adding ({C} magic symbol) ({C} magic symbol) ({C} magic symbol) ({C} magic symbol) .