Agatha of the Vile Cauldron + Fertile Ground + Silvanus's Invoker

RG identity

Commander legal

The 3 combo pieces

• Agatha of the Vile Cauldron
• Fertile Ground
• Silvanus's Invoker

How to execute it

1. Activate the land with Fertile Ground attached by tapping it, adding {1}.
2. Fertile Ground triggers, adding {1}.
3. Activate Silvanus's Invoker by paying {1}, untapping the land and causing it to become an 8/8 Elemental with trample and haste in addition to its other types until end of turn.
4. Repeat.

What the combo produces

• Infinite mana lands you control can produce
• Infinite power and toughness for most creatures you control until end of turn
• Infinite untap of lands you control