Aetherworks Marvel

Aetherworks Marvel {4}

Legendary Artifact
Whenever a permanent you control is put into a graveyard, you get {E} (an energy counter).
{T}, Pay {E}{E}{E}{E}{E}{E}: Look at the top six cards of your library. You may cast a card from among them without paying its mana cost. Put the rest on the bottom of your library in a random order.