Ghave, Guru of Spores, Earthcraft, and Cathars' Crusade

Prerequisites

• Ghave, Guru of Spores on the battlefield
• Earthcraft on the battlefield
• Cathars' Crusade on the battlefield
• There is a +1/+1 counter on a creature you control
• You control a basic land

Steps

1. Activate a basic land by tapping it, adding
2. Activate Ghave's first ability by paying and removing a +1/+1 counter from a creature you control, creating a 1/1 Saproling token
3. When the Saproling enters the battlefield, Cathars' Crusade triggers, putting a +1/+1 counter on each creature you control
4. Activate Earthcraft by tapping the Saproling token, untapping a basic land
5. Repeat

Results

• Infinite +1/+1 counters
• Infinite creature tokens
• Infinite ETB
• Infinite mana basic lands you control can produce
• Infinite untap of basic lands you control