Horse of Rohan

Bestow {1}{g/w} (If you cast this card for its bestow
cost, it's an Aura spell with enchant creature. It
becomes a creature again if it's not attached to a
creature.)
Flanking (Whenever a creature without flanking
blocks this creature, the blocking creature gets -1/-1
until end of turn.)
Enchanted creature gets +1/+1 and has flanking.