Teferi, Who Slows the Sunset + Lithoform Engine

Teferi, Who Slows the Sunset
Lithoform Engine

Requires
All permanents on the battlefield. You control a creature and/or a land that can tap to produce 3.
Steps
  1. Activate Teferi's first ability by putting a loyalty counter on it
  2. Holding priority, activate the creature and/or land by tapping it, adding at least 3
  3. Activate Lithoform Engine's first ability by paying 2 and tapping it, copying Teferi's ability
  4. Resolve the copy of Teferi's ability, untapping Lithoform Engine and the creature and/or land that can produce at least 3, and causing you to gain two life
  5. Repeat from step 2
Results
Infinite mana creatures you control can produce. Infinite mana lands you control can produce. Infinite lifegain. Infinite lifegain triggers. Infinite untap of creatures you control. Infinite untap of lands you control.