At the beginning of combat, Workshop Elders triggers, making Basalt Monolith a 0/0 artifact creature until end of turn and putting four +1/+1 counters on it.
Activate Basalt Monolith's first ability by tapping it, adding ({C} magic symbol) ({C} magic symbol) ({C} magic symbol) .
Activate Basalt Monolith's last ability by paying ({2} magic symbol) , untapping it.