Settuke, the Unborn Cavalry

Creatures you control have flanking X,
where X is Settuke, the Unborn Cavalry's
power. (Whenever a creature without flanking blocks this creature, the blocking creature gets
-1/-1 until end of turn for each point of flanking.)
{1}{b}: Settuke, the Unborn Cavalry gets
+2/+2 until end of turn.