Solar Array + Sydri, Galvanic Genius + Pemmin's Aura

Solar Array

Sydri, Galvanic Genius

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.

This clever loop hinges on turning Solar Array into a creature using Sydri, Galvanic Genius, which allows it to legally host Pemmin's Aura right on the artifact mana source. Once enchanted, you can tap Solar Array for mana, then spend that very blue mana to activate Pemmin's Aura's untap ability, generating an infinite supply of taps. Every iteration of this tapping also builds up Solar Array's delayed sunburst trigger, meaning the next artifact spell you cast will absorb all those accumulated colors of mana. When you finally release that stored energy on an artifact like Solar Array itself or another spell, it enters the battlefield with infinite +1/+1 or charge counters.