Murderous Redcap + Martyr's Cause + Renata, Called to the Hunt

Murderous Redcap

Martyr's Cause

Renata, Called to the Hunt

How it works

1. Sacrifice Murderous Redcap to Martyr's Cause to prevent all damage to a creature.
2. Murderous Redcap's persist triggers, returning it to the battlefield.
3. Murderous Redcap returns to the battlefield with a +1/+1 counter and a -1/-1 counter which cancel out.
4. Murderous Redcap triggers, dealing 2 damage to any target.
5. Repeat.