Gilder Bairn + Lost Jitte + Viridian Longbow

Gilder Bairn

Lost Jitte

Viridian Longbow

How it works

1. Activate Viridian Longbow by tapping Gilder Bairn, producing its effect.
2. Activate Gilder Bairn by paying 2G/U and untapping it, doubling each counter on Lost Jitte.
3. Activate Lost Jitte three times by removing three charge counters from it, untapping three lands.
4. Activate those lands by tapping them, adding 2G/U.
5. Once you have infinite counters on Lost Jitte, you may instead double the counters on any other permanents.