Twins of the Silent Hills

Bestow {1}{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.)
Twins of the Silent Hills can't attack or block unless it's controller controls another enchantment.
Enchanted creature gets +1/+1 and can't attack or block unless it's controller controls another enchantment.