Gilder Bairn + Lost Jitte + Earthcraft

Gilder Bairn

Lost Jitte

Earthcraft

How it works

1. Activate a basic Forest or Island by tapping it, adding G/U.
2. Activate Earthcraft by tapping Gilder Bairn, untapping the basic Forest or Island.
3. Activate the Forest or Island by tapping it, adding G/U.
4. Activate Gilder Bairn by paying 2G/U and untapping it, doubling each counter on Lost Jitte.
5. Activate Lost Jitte by removing a charge counter from it, untapping a land.
6. Activate that land by tapping it, adding 1.
7. Repeat steps 5 and 6 one additional time.
8. Repeat from step 2.
9. Once you have infinite counters on Lost Jitte, you may instead double the counters on any other permanents.