Reaper King + Wingrattle Scarecrow + Melira, Sylvok Outcast

Reaper King

Wingrattle Scarecrow

Melira, Sylvok Outcast

How it works

1. Cast Wingrattle Scarecrow by paying 3.
2. Wingrattle Scarecrow enters the battlefield, triggering Reaper King, destroying Wingrattle Scarecrow.
3. Wingrattle Scarecrow dies, triggering its persist ability, returning it to the battlefield with no -1/-1 counters due to Melira.
4. Repeat from step 3.