Ozak's Refuge

When Ozak's Refuge enters play, gain 3 {u} mana.
{6}{t}: Choose a player. That player must return all creature and artifact cards into
his deck. Then shuffle his deck. After,
exile Ozak's Refuge.
Ozak was a cephelapod automaton that was not keen on the idea of Earth domination. He
enjoyed the company of humans..