The Duke of Midrange 
Legendary Creature — Lhurgoyf Wizard
When The Duke of Midrange enters the battlefield, choose one of Thoughtseize, Lightning Bolt, or Abrupt Decay. Cast a copy of the chosen card without paying its mana cost. The Duke of Midrange's power is equal to the number of card types among cards in all graveyards and its toughness is equal to that number plus 1.
Legality
standardNOT LEGALpioneerNOT LEGALmodernNOT LEGALlegacyNOT LEGALvintageNOT LEGALcommanderNOT LEGAL