Elvish Aberration, Umbral Mantle, and Leyline of Abundance

Prerequisites

• Elvish Aberration on the battlefield
• Umbral Mantle on the battlefield
• Leyline of Abundance on the battlefield

Steps

1. Activate Elvish Aberration by tapping it, adding
2. Activate Umbral Mantle by paying , untapping Elvish Aberration
3. Repeat

Results

• Infinite green mana
• Infinite untap of creatures you control
• Infinite mana creatures you control can produce
• Infinitely large creature until end of turn