Gilder Bairn, Workhorse, and Earthcraft

Prerequisites

• Gilder Bairn on the battlefield
• Workhorse on the battlefield
• Earthcraft on the battlefield

Steps

1. Activate a basic Forest or Island by tapping it, adding
2. Activate Earthcraft by tapping Gilder Bairn, untapping the basic Forest or Island
3. Activate the Forest or Island by tapping it, adding
4. Activate Gilder Bairn by paying and untapping it, doubling each counter on Workhorse
5. Activate Workhorse as many times as necessary by removing counters from it, adding at least two mana
6. Repeat from step 2
7. Once you have infinite counters on Workhorse, you may instead double the counters on any other permanents

Results

• Infinite colorless mana
• Infinite proliferate for permanents
• Infinite +1/+1 counters on a creature