Infinite creature ETBInfinite creature LTBInfinite blinkingInfinite lifegainInfinite lifegain triggersInfinite mana lands you control can produceInfinite storm countInfinite untap of lands you control
How it works
Activate any number of lands you control by tapping them, adding at least 4.
Activate Zacama's first ability by paying 2, targeting itself.
Monk Gyatso triggers, airbending Zacama.
Zacama's ability from step 2 fizzles due to no longer having a legal target.
Cast Zacama from exile by paying 2.
When Zacama enters, it triggers, untapping all lands you control.