MTG Combo: Brass's Bounty + Deadeye Navigator + Dualcaster Mage
Generates infinite mana, requires 9 mana to start up.
Simply cast Brass's Bounty, and then activate Deadeye Navigator's exile ability on Dualcaster mage, copying Brass's Bounty, using the mana generated from the treasures created by the copy of Brass's Bounty to blink Dualcaster Mage again, repeat.