Oktay, Devourer of Worlds

Protection from Red and Black. Threatening.
When Oktay enters the battlefield, he deals 5 damage to each player and creature, this damage cannot be prevented.
When Oktay attacks or is blocked, he gets +2/+2 for each creature that died this turn.
{c}{c}{c}{c}:Vibration You can pay 4 mana of any color to grant Oktay flying for one turn He cannot be blocked.
{p/r}{p/r}{p/r}:Rage You can pay 3 red mana to give Oktay +3/+0 and double hit, until end of turn.