Careful Cultivation + Training Grounds + Umbral Mantle

GU identity

Commander legal

The 3 combo pieces

• Careful Cultivation
• Training Grounds
• Umbral Mantle

What must be in place

Umbral Mantle and Careful Cultivation attached to the same creature you control that does not have summoning sickness.

How to execute it

1. Activate the creature with Careful Cultivation and Umbral Mantle attached by tapping it, adding {G}{G}.
2. Activate the creature by paying {1} and untapping it, causing it to get +2/+2 until end of turn.
3. Repeat.

What the combo produces

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