Solar Array + Pemmin's Aura + Mishra, Eminent One

Solar Array

Pemmin's Aura

Mishra, Eminent One

How it works

1. At the beginning of your combat phase, Mishra triggers, creating a token copy of Solar Array that is a 4/4 artifact creature named Mishra's Warform with haste.
2. Cast Pemmin's Aura by paying its mana cost, attaching it to Mishra's Warform.
3. Activate Mishra's Warform 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 Mishra's Warform.
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 animating Solar Array into a 4/4 artifact creature with haste via Mishra, Eminent One's combat trigger, you turn it into a valid host for Pemmin's Aura. Once the Aura is attached, tapping the animated Solar Array produces blue mana while banking an extra instance of sunburst for your next artifact spell, and a single blue mana spent on Pemmin's Aura's untap ability resets the whole loop. Repeating this process as many times as you like generates infinite mana-producing taps and stacks up an arbitrary number of sunburst applications, meaning the next artifact creature or noncreature artifact you cast will enter the battlefield completely overflowing with +1/+1 or charge counters.