Rag'nar'øk

You and creatures you own receive half of normal damage.
Your opponents and creatures they own receive
double damage.
If Rag'nar'ok would leave the battlefield put 2
rest counters on it instead. At a beginning of your upkeep remove one rest counter. This ability is
not activated by Rag'nar'ok itself.
{r/w}{r/w}{b/r}{b/r} {t}:Deal 10 damage to all players or all creatures. Exile Rag'nar'ok.