Voltaic Construct + Encroaching Mycosynth + Accomplished Alchemist

Voltaic Construct

Encroaching Mycosynth

Accomplished Alchemist

How it works

1. Activate Accomplished Alchemist by tapping it, adding at least 3.
2. Activate Voltaic Construct by paying 2, untapping Accomplished Alchemist.
3. Repeat

This clever loop transforms an unassuming life-gainer into a boundless mana engine by turning every piece of the puzzle into an artifact. While Accomplished Alchemist is normally limited by how much life you've gained to generate a large burst of mana, Encroaching Mycosynth reshapes the battlefield by turning all your nonland permanents—including the Alchemist itself—into artifacts. This type-changing magic allows Voltaic Construct to target and untap the Alchemist for a mere two mana, leaving you with a surplus of green or colored mana to feed the loop again and again.