MTG >Combos >Teferi, Temporal Archmage +Lithoform Engine +

Tap three Activate Teferi's ability to untap four permanents Respond to the ability by activating Lithoform Engine to copy it. Let the copy resolve, untap three lands and Lithoform Engine. Respond to the ability on the stack by tapping three lands and copying it again. Repeat the process for infinite mana.