Serra, a Light of Hope

+2: Target creature you control gains your choice of first strike, haste, vigilance, or +2/+2.
-2: Target creatures you control gains your choice of double strike, lifelink, flying, or +4/+4.
-8: You get an emblem with "All creatures you control with flying gain hexproof & indestructible as long as you control Serra, a Light of Hope."