Rokash, Flaming Banquisher

{r},{t}: Each player exiles the top card of their library. Until end of turn, players may play cards exiled this way as though they had flash.
{w},{t}: Until end of turn, if a source you control would deal noncombat damage to a creature or planeswalker, exile it instead.
{w}{w}{r}{r}: Creatures you control gain get +1/+0 for each card your opponents own in exile and gain first strike. Activate this ability only once each turn.