Roalesk, Apex Hybrid + Sage of Hours + Mirror Mockery + Helm of the Host

Roalesk, Apex Hybrid

Sage of Hours

Mirror Mockery

Helm of the Host

How it works

1. At the beginning of combat, Helm of the Host will trigger, making a nonlegendary copy of Roalesk.
2. When the Roalesk token ETBs, put the 2 +1/+1 counters on Sage of Hours.
3. Attack with the nontoken Roalesk.
4. Mirror Mockery triggers, making a copy of Roalesk.
5. 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.
6. Resolve the ETB trigger, increasing the total number of +1/+1 counters on Sage of Hours to 6.
7. Remove all +1/+1 counters from Sage of Hours to take an extra turn.
8. Repeat for infinite turns.