Voltaic Construct + Memnarch + Incubation Druid

Voltaic Construct

Memnarch

Incubation Druid

How it works

1. Cause Incubation Druid to become an artifact using Memnarch.
2. Activate Incubation Druid by tapping it, adding three mana of any type a land you control can produce
3. Activate Voltaic Construct by paying 2, untapping Incubation Druid.
4. Repeat from step 2.

By using Memnarch to turn Incubation Druid into an artifact, we lay the groundwork for a clever machinery of conversion and untapping. Incubation Druid can then tap to produce three mana thanks to its +1/+1 counters (or its adapted state), which easily pays for the activation cost of Voltaic Construct. In turn, Voltaic Construct uses that generated mana to untap the druid, leaving you with a surplus of mana and a creature ready to tap all over again.