Arinox, Slumbering Ancient

Flying, trample, haste
When Arinox, Slumbering Ancient enters the battlefield, exile it with 5 slumber counters on it.
Whenever a permanent an opponent controls
deals damage to you, remove that many slumber counters, rounded up, from Arinox instead.
As long as Arniox has a slumber counter on it, it remains in exile.