The Witch King of Angmar

Eminence - As long as The Witch King of Angmar
is in the command zone or on the battlefield,
lands you control have "{t}: Add one mana of any
color to your mana pool." When you cast this
spell, you may return target card from your
graveyard to your hand.
Flying, trample, protection from Aura spells
The Witch King of Angmar can't block and
attacks each combat if able. The Witch King of
Angmar's power and toughness are each equal to
the number of lands you control.