Voltaic Construct + Memnarch + Rofellos, Llanowar Emissary

Voltaic Construct

Memnarch

Rofellos, Llanowar Emissary

How it works

1. Cause Rofellos to become an artifact using Memnarch.
2. Activate Rofellos by tapping it, adding at least .
3. Activate Voltaic Construct by paying 2, untapping Rofellos.
4. Repeat from step 2.

This brilliant mana engine transforms Rofellos, Llanowar Emissary into an artifact creature using Memnarch's continuous ability, allowing it to take full advantage of Voltaic Construct's untap capability. Because Rofellos taps to produce a massive surge of green mana depending on how many Forests you control, you will easily net a profit after paying the Construct's two-mana activation fee. This lets you cycle the loop infinitely to generate boundless green mana—which you can then channel back into Memnarch to steal every single permanent your opponents control.