Trazyn the Infinite, and Lost Jitte

Prerequisites

• Trazyn the Infinite on the battlefield
• Lost Jitte in the graveyard

Steps

1. Animate the land, if needed
2. Activate Trazyn using the Spacecraft's station ability by tapping the animated land, putting a number of charge counters on Trazyn equal to the animated land's power
3. Activate Trazyn using Lost Jitte's ability by removing a charge counter from it, untapping the animated land
4. Repeat from step 2

Results

• Infinite mana lands you control can produce
• Infinite untap of lands you control