Magnus Optimum

Magnus Optimum's power and toughness are {x}.When Magnus Optimum enters the battlefield return {x} Instants or Sorcery cards from your graveyard to the top of your library in any order
and you may cast a spell with converted mana
cost {x} or less. {w/u}{w/u}{t}: Search your library for a
Wizard spell with converted mana cost equal to or
less than Magnus Optimum's power or toughness.