Sigarda, Guardian of Innistrad

Flying, Vigilance
{g}{w}: Create a green, white Aura enchantment
token named Ward attached to another target creature or land. The token has enchant
permanent and enchanted permanent has
hexproof, and can't be sacrificed by an opponents spells and abilities.
If you control 4 or more Wards, enchanted
creatures you control gain +2/+2.