Power Artifact + Bigger on the Inside + Retrofitter Foundry

Power Artifact

Bigger on the Inside

Retrofitter Foundry

How it works

1. Activate Retrofitter Foundry by tapping it, adding two mana of any color and causing the next spell you cast this turn to have cascade.
2. Activate Retrofitter Foundry's first ability by paying 1, untapping it.
3. Repeat.
4. Once you have infinite mana, you may activate Retrofitter Foundry's other abilities.

By enchanting Retrofitter Foundry with Power Artifact, you reduce the steep untap activation cost down to just one mana, turning a normally prohibitive ability into an engine for profit. Tapping the Foundry to pump out mana with the help of Bigger on the Inside provides more than enough energy to continuously untap and reactivate it, generating infinite colored mana and an endless chain of cascade triggers. Once you've established this infinite loop, you can freely cycle through Retrofitter Foundry's remaining abilities to flood the board with an endless army of Servo, Thopter, and Construct tokens alongside all the associated artifact and creature triggers you could ever want.