Exchange of Words + Ley Weaver + Mishra's Factory

Prerequisites

• Mishra's Factory does not have summoning sickness.
• You control at least one additional land.

Steps

1. 1Activate Mishra's Factory's second ability by paying , causing it to become a 2/2 Aseembly-Worker artifact creature in addition to its other types.
2. 2Cast Exchange of Words by paying .
3. 3When Exchange of Words enters the battlefield, it triggers, exchanging the text boxes of Ley Weaver and Mishra's Factory.
4. 4Activate Mishra's Factory by tapping it, untapping itself and any other land you control.
5. 5Repeat step 4.

Effects

• Infinite mana lands you control can produce
• Infinite untap of lands you control