Voltaic Construct + Llanowar Tribe + Liquimetal Torque

Voltaic Construct

Llanowar Tribe

Liquimetal Torque

How it works

1. Cause Llanowar Tribe to become an artifact using Liquimetal Torque.
2. Activate Llanowar Tribe by tapping it, adding
3. Activate Voltaic Construct by paying 2, untapping Llanowar Tribe.
4. Repeat from step 2.

This clever three-card loop relies on Liquimetal Torque to fundamentally transform the battlefield, turning Llanowar Tribe into an artifact so it can be targeted by Voltaic Construct's untap ability. Once Llanowar Tribe is an artifact creature, tapping it for a massive infusion of three green mana provides more than enough resources to pay for Voltaic Construct's untap cost with mana to spare. By continually looping this activation, you generate an infinite supply of green mana alongside an arbitrarily large number of untaps.