Feanor, Burning King

When Feanor, Burning King enters the
battlefield search your deck for an artifact, reveal
it, and put it into your hand.
{b/r}{t}, sacrifice an artifact; Feanor, Burning King
deals damage to target player or permanent equal
to the sacrificed artifact's converted mana value.
When Feanor, Burning King would be put into a graveyard exile it instead.