Kutone, Glowing Silver

Whenever this artifact transforms into Kutone,
Glowing Silver, you may search your library for
a card named Ark of Yamato, put it into your
graveyard, then shuffle your library. You may
cast that spell without paying its mana cost.
Equip non-Demon creature {2}
If equipped creature isn't selfless, transform
Kutone, Glowing Silver.
"The time to wield the legendary sword Kutone
is now!" —Oki