Solar Array + Tezzeret, Betrayer of Flesh + Pemmin's Aura

Solar Array

Tezzeret, Betrayer of Flesh

Pemmin's Aura

How it works

1. Animate Solar Array, if needed.
2. Cast Pemmin's Aura by paying its mana cost, attaching it to Solar Array.
3. Activate Solar Array by tapping it, adding and causing the next artifact spell you cast this turn to have sunburst.
4. Activate Pemmin's Aura by paying , untapping Solar Array.
5. Repeat from step 3 as desired.
6. Cast any artifact spell, triggering its sunburst ability an infinite number of times, either putting infinite +1/+1 counters on charge counters on the artifact.

By turning Solar Array into an artifact creature with Tezzeret, Betrayer of Flesh, we open the door to enchanting it directly with Pemmin's Aura. From there, Pemmin's Aura uses its untap ability, fueled by the mana from Solar Array, to continuously refresh the mana source in a self-sustaining loop. Because Solar Array's mana ability also tacks sunburst onto your next artifact spell, repeating this loop lets you build up an arbitrarily large number of activations before you finally cast your artifact, leaving it to enter the battlefield with infinite +1/+1 counters or charge counters.