Sylvan Offering, Aggravated Assault, and Earthcraft

Prerequisites

• Sylvan Offering in hand
• Aggravated Assault on the battlefield
• Earthcraft on the battlefield
• You control a basic Mountain
• available

Steps

1. Cast Sylvan Offering by paying , causing you and an opponent to create a 5/5 Treefolk creature token and five 1/1 Elf Warrior creature tokens
2. Activate Earthcraft by tapping the Treefolk token, untapping a basic Mountain you control
3. Activate the Mountain by tapping it, adding
4. Repeat from step 2 five additional times, tapping the Elf Warrior tokens instead
5. Activate Aggravated Assault by paying , untapping all creatures you control and giving you an extra combat and main phase after this one
6. Repeat from step 2

Results

• Infinite combat phases
• Infinite mana basic lands you control can produce
• Infinite mana creatures you control can produce
• Infinite untap of creatures you control