Khalida Oathkeeper

Khalida Oathkeeper is colorless.
You can't cast Khalida Oathkeeper unless you've
cast an enchantment spell with converted mana
cost 4 or greater.
Khalida Oathkeeper has all abilities of all enchantments and auras you control.
"This, I promise you." - Khalida Oathkeeper to
Nissa, in front of a Golgari palace