Nenya, The Ring of Adamant

Indestructible, Protection from red and black
{t}{u} Blue spells cost {1} less.
Equip {4} Only to a Legendary Creature of Power 3 or greater.
Wearer gains +1/+1
Nenya, in Quenya it was named The Ring of Water or the White Ring and was forged by Celebrimbor for himself but he later gifted it to Galadriel the Lady of Lothlorien