Cast Ancestral Statue by paying ({4} magic symbol) .
When Ancestral Statue enters the battlefield, it and Trostani trigger.
Resolve the Ancestral Statue trigger, returning it from the battlefield to your hand.
Resolve the Trostani triggers, causing you to gain life equal to Ancestral Statue's toughness.
Workhorse triggers, putting four +1/+1 counters on itself.
Activate Workhorse four times by removing four +1/+1 counters from it, adding ({C} magic symbol) ({C} magic symbol) ({C} magic symbol) ({C} magic symbol) .