Arturos, Beacon of Distra

Permanents you control have ward {x}, where X
is Arturos' power.
{ut}: put a +1/-1 counter on Arturos.
{r}, {t}: Arturos deals 2 damage to any target and
1 damage to himself. If this damage would
destroy Arturos, Beacon of Distra, exile him,
then return him to the battlefield transformed
under his owner's control.