King Deamon's Mirthil Armor

Indestructible
Equipped creature gets +0/+6, Indestructible
and "Prevent all damage dealt to this creature".
If equipped creature is an Elf, it also gets First
Strike and Vigilance.
Equipped creature's abilities cost {1} less to cast.
Equip {4}
"Mithril. As light as a feather, and as hard dragon
scales."
—Bilbo Baggins