Stone-Seeder Hierophant, Gaea's Cradle, and Umbral Mantle

Prerequisites

• Stone-Seeder Hierophant on the battlefield
• Gaea's Cradle on the battlefield
• Umbral Mantle on the battlefield
• Umbral Mantle attached to Stone-Seeder Hierophant
• Stone-Seeder Hierophant does not have summoning sickness
• You control at least four creatures

Steps

1. Activate Gaea's Cradle by tapping it, adding at least
2. Activate Stone-Seeder Hierophant by tapping it, untapping Gaea's Cradle
3. Activate Stone-Seeder Hierophant by paying and untapping it, giving it +2/+2 until end of turn
4. Repeat

Results

• Infinitely large Stone-Seeder Hierophant until end of turn
• Infinite mana lands you control can produce
• Infinite untap of lands you control