Fists of the Demigod

Fists of the Demigod

Enchantment - Aura (CMC 2)
Enchant creature
As long as enchanted creature is black, it gets +1/+1 and has wither. (It deals damage to creatures in the form of -1/-1 counters.)
As long as enchanted creature is red, it gets +1/+1 and has first strike.