My combo challenge

Enchant creature : Tap enchanted creature. : Untap enchanted creature.

Whenever this land becomes tapped, it deals 1 damage to you. : Add one mana of any color.

: Add one mana of any color that a land an opponent controls could produce.

Exchange control of target land you control and target land an opponent controls. (This effect lasts indefinitely.)

If you tap a permanent for mana, it produces twice as much of that mana instead.