Argothian Elder + Griffin Canyon + Unnatural Selection

GU identity

Commander legal

The 3 combo pieces

• Argothian Elder
• Griffin Canyon
• Unnatural Selection

What must be in place

Argothian Elder does not have summoning sickness.
You control at least one additional land.

How to execute it

1. Activate Griffin Canyon's first ability by tapping it, adding {C}.
2. Activate Unnatural Selection by paying {1}, causing Argothian Elder to become a Griffin until end of turn.
3. Activate Argothian Elder by tapping it, untapping Griffin Canyon and another land.
4. Activate Griffin Canyon's second ability by tapping it, untapping Argothian Elder and giving it +1/+1 until end of turn.
5. Repeat from step 3.

What the combo produces

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