Helm of the Host and Mirror Mockery attached to Roalesk.
One opponent can be attacked.
Steps
At the beginning of combat, Helm of the Host will trigger, making a nonlegendary copy of Roalesk.
When the Roalesk token ETBs, put the 2 +1/+1 counters on Sage of Hours.
Attack with the nontoken Roalesk.
Mirror Mockery triggers, making a copy of Roalesk.
Place its ETB trigger onto the stack targeting Sage of hours, then sacrifice this token copy due to the legend rule, proliferating the +1/+1 counters on Sage of Hours up to 4.
Resolve the ETB trigger, increasing the total number of +1/+1 counters on Sage of Hours to 6.
Remove all +1/+1 counters from Sage of Hours to take an extra turn.